Jennifer Aniston finds Justin Theroux attractive because he is good at "so many things".
The 'Horrible Bosses 2' actress - who has been engaged to the 43-year-old actor for two years - also admires her fiance for being "humble and decent", admitting she is relieved success hasn't changed him.
She said: "Not only is he a great actor but he's one of the best comedy writers out there. And he directs and paints murals.
"And I just think it's so attractive to be that good at so many things and to have no ego. He's one of the most humble, decent human beings. He's not an ass.
"He's not like some of our friends who are young and up-and-coming and they hit celebrity, and all of a sudden you're like, 'Oh! You're different. Now you don't say hi to people?' "
The 45-year-old actress never gets bored with Justin because they have so much to talk about.
Speaking to the new issue of America's Harper's Bazaar magazine: "It's almost impossible to get bored with one another. We've tried so hard! And even that's interesting because his eyes are so pretty, but we can entertain ourselves and talk about endless things, which is pretty great."
And the 'Cake' star admires the way the 'Leftovers' actor deals with the attention their relationship brings so easily.
She said: "He's just been doing it so graciously and gracefully, and it's a strange ballpark to walk into. He's in his body, for sure. He's a pretty realised person. But he's been doing this for 20 years."

Taylor Swift loves to do cross-stitches of "ironic" rap lyrics and gift them to her friends.
The 24-year-old singer - whose pals include Lorde, Lena Dunham and Karlie Kloss - admits she has learned a lot in the past two years of her life, such as how to master the art of thread embroidery, but also that she can be just as in love with her pals as she could with a boyfriend.
She said: "I didn't realise that being in love with your life can be just as wonderful as being in love with another person.
"Every relationship takes work and effort, and when I put that work and effort into my friends, family, and fans ... my life changed completely.
"I started making choices based on what I wanted, and didn't feel like I needed to justify them. If I wanted to cut my hair, I did it. If I wanted to move to New York, I did it. If I wanted to take a spontaneous road trip, I did it.
"At 24 I decided that my life is enough for me, and I stopped looking for some other piece to complete it.
"I also learned how to needlepoint ironic cross-stitches of rap lyrics and gave them to my friends as presents."
As well as giving her friends physical presents, the 'Blank Space' hitmaker loves to send them an emoji symbol of Santa Claus on a regular basis, even when the festive period is not near, because she insists Father Christmas is "always watching".
When asked what her most frequently used emoji tab is, she told BuzzFeed: "The thumbs-up, the wide-eyed surprised-face emoji, and I think it's pretty important to send a random Santa emoji to people without any explanation at all. Because he's always watching."

Kim Kardashian West can balance a champagne glass on her bottom.
The socialite - who has a 16-month-old daughter, North, with 'Bound 2' rapper Kanye West - appears on the cover of New York magazine Paper and recreates French photographer Jean-Paul Goude's famous "Champagne Incident" shot.
Tweeting about her unusual ability, she said: "And they say I didn't have a talent...try balancing a champagne glass on your ass LOL (sic)."
She also posted the cover, shot by the same photographer who created the original image, on Instagram with a caption saying: "Paper Magazine new cover alert! - such a honor to work with the legendary Jean-Paul Goude!!!! Shot this in Paris. Can't wait for you to see the whole issue. (sic)"
The 34-year-old entrepreneur also features in a second cover which shows her naked with her broad backside oiled up and exposed, as part of the magazine's 'Break the Internet' campaign.
However, some celebrities have hit out at the 'Keeping Up With the Kardashians' star, with 'Glee' actress Naya Rivera criticising Kim for the saucy nature of the images.
Commenting on her Instagram picture, she wrote: "I normally don't. But... you're someone's mother... (sic)"

Simon Cowell has joked his son should be One Direction's new drummer.
The music mogul shared an adorable video of the seven-month-old tot hitting a drum online earlier today (12.11.14), and praised his little one for his musical ability.
In a post on his official Facebook page, he quipped: "One Direction have just hired Eric as their new drummer."
The 55-year-old music mogul and his partner Lauren Silverman welcomed their first child into the world in February, and it seems he is already taking after his father when it comes to his passion for music, banging along to the band's hit single 'Story of My Life'.
The proud father is currently appearing as a judge on the eleventh series of the 'X Factor', but his close friend Sinitta has revealed that while he is not dishing out criticism to the competition's hopefuls, he is spending lots of time playing with his toddler.
She gushed: "He's crawling and moving around so much. Becoming a father has been the making of Simon, it's changed him.
"Baby Eric is a mini Simon and so adorable."
However, when questioned on whether he thinks Eric's loved-up parents are planning on getting hitched, she expressed her doubts.
She said: "I'm not sure if Simon will get married to Lauren."
The 'So Macho' singer added: "I think he and Lauren will definitely have more kids, they're both great parents."

Robin Wright has split from Ben Foster.
The 'House of Cards' star and her fiancé of 10 months have ended their romance after realising their plan to tie the knot wasn't the "right decision".
The blonde beauty, 48, reportedly decided to call time on her relationship after spending time away from Ben, 34, filming the hit Netflix series in Baltimore while he worked on a production of 'A Streetcar Named Desire' in London over the summer.
A source told Us Weekly: "She got swept up in the engagement last Christmas, but then their schedules got crazy and she realised it wasn't the right decision."
Robin - who was previously married to Dane Witherspoon and has two children, Dylan, 23, and Hopper Jack, 21, with her ex-husband Sean Penn - is said to have become concerned over the couple's 14-year age gap and "couldn't deal with him anymore".
The source explained: "The gap just ended up being too much
"Ben was kind of immature. She couldn't deal with him anymore."
The pair met on the set of their movie 'Rampart' in 2011 and are believed to have started dating in February 2012.
The pretty actress was first spotted wearing her engagement ring in January this year.

Kim Kardashian West was dressed rather more conservatively than her controversial Paper Magazine cover as she returned to her New York apartment with her daughter, North West, on Tuesday evening (11.11.14). The 34-year-old entrepreneur wore a woollen g...

Lena Dunham showed off her new hair colour at PEN Center USA's 24th Annual Literary Awards Festival. The actress dyed her hair green recently but was back to blonde for the event, which she attended with fellow 'Girls' creator, Judd Apatow.

Jessie J took a stroll through the streets of Washington DC in casual tracksuit bottoms and a baseball cap, but didn't seem to be doing much sightseeing as she was stuck to her phone the whole time. The 'Bang Bang' singer was in the US capital to perfo...

Channing Tatum was dressed up to the nines in a three-piece grey suit for the premiere of his new movie in New York. The handsome actor attended the event at New York's Museum of Modern Art to celebrate his new movie 'Foxcatcher' which he stars in alon...

Jack Black greeted and posed for photos with fans at the Mandarin Oriental Hotel in Washington DC on Tuesday (11.11.14). The 'School of Rock' actor was heading out of his hotel to attend the Concert for Valor, but was happy to chat with fans before lea...

Katie Holmes wore a casual grey jumper and blue denim jeans as she popped out and about in New York on Tuesday (11.11.14). The 35-year-old actress - who has eight-year-old daughter Suri with former husband Tom Cruise - was spotted in the SoHo area of t...

Elle Fanning has ditched her beautiful blonde locks for a boyish, auburn hairdo for her new movie 'Three Generations'. The 16-year-old actress - who will play transgender male, Ray - was spotted shooting scenes for the film in New York in an unflatteri...