No one wants to see a person on TV who's super-ultra-cool. That's Superman, that's a thing of the past. Heroes are now flawed, and have terrible tempers, you know? They're real people.

I love what I do. And why not be nice? I mean, I've seen people who work and they're apparently not enjoying it, and they're making sure everybody knows it.

I think TV has been a little bit irresponsible in how they portray these people because homicide detectives are not brooding, tortured souls who are stained with the stink of the city and who have blood on their hands. They are real, live people that are incredibly entertaining.

In all my characters, I try to find an iota of myself, and in Castle, I found a lot. He gets away with a lot, so that's fun.

When I go to a sci-fi convention, oh God, it's the closest thing to being a rock star I will ever know in this life. I want to be a rock star, don't you? It's a good thing to be, a rock star.

I'm not a big prop actor.

Whatever our bedtime was as kids, we could stay up an extra half hour if we were reading. My parents didn't care as long as I was under the spell of a Stephen King or a Douglas Adams. Now I read in bed. I read at work. I read standing in line. It's like, 'Hello, my name is Nathan and I am a reader.'