I am a huge Pistons fan. Those were some of my best times in college, watching the Detroit Pistons.

The biggest challenges are in the same vein. It's about retaining all that stuff. Also, the physical stuff is not as easy as we originally thought. I play a lot of sports and I remember saying, "Oh, I'll be fine, running around or doing anything."

It was so ridiculous. We were just sitting there, thinking about how ridiculous it was because we literally had stray hairs on us. The camera couldn't pick up all the details, but we had some crazy things. We had huge slabs of fat on us and bits of nails and hair. It was disgusting. But, there's also the beautiful parts of it.

I think there are fans who love the genre to begin with, and there are fans who love the comic book to begin with, but fans of the comic book aren't necessarily fans of the genre. There are obviously a lot of those people who love both, but I'm not a huge fan of that genre, personally.

I know a lot of people who say, "I reluctantly watched the first episode because I don't really like zombies and that stuff, but I was pleasantly surprised by the characters and the drama of it all." I think that's what keeps people coming back and brings new watchers to the show. What the show does is cross many, many different viewerships.

I'm good at keeping secrets, but if it's not something super serious I usually tell people not to tell me because I'll tell someone else.

Confidence. That's huge as an actor. Confidence can get you a long way. Maybe it's a cultural thing, being Korean, but my first reflex has always been to exude humility - but it doesn't help you in acting. For acting, humility isn't the best thing. It'll weaken your work. So it's a head game for me. "Can I really be confident in knowing my skill set is down? Can I perform like I own this role?"