It's a trap I've fallen into earlier in my career - trying to be liked. Don't do it. When I watch TV and I see someone trying to make me like them, acting cute or quirky or goofy, I'm not impressed. Don't act like America's watching you. Just latch onto your character. Characters are flawed. Be unlikeable. Be flawed. Be a person.

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.

My brother used to say that when you deal with women, it's difficult to remove emotions from an argument. I never really knew what he meant. Then I read an article that said when it comes to emotion and logic, men's and women's brains are different - my brother was right! Women are very mysterious, but that's part of their joy.

Basically, after an ABC sitcom I did, I ended up with a holding deal with 20th Century Fox. Absolutely cool. It pays you to be unemployed. And the bigger the entity that gives you the deal, the better.

I love 'Strange Brew'. I quote that movie all the time, and no one knows what I'm talking about.

What draws me to roles, I think, are moments - moments that define character, where so much more of the story is told in just a moment - a look, a line, a short scene, but something that speaks a volume, something that speaks to me.

Castle isn't really affected emotionally by murder. He's thrilled about, 'Oh, my God, I wonder how this happened?'