You get to a certain point - gratefully - when you're out of your twenties, and you realize how fleeting life is. So, it becomes important to feel as if the people in your life know exactly how you feel about them at all times.

There is that stereotype of a nerd with the high pants and pocket protector and that kind of thing. That can sustain comedy for maybe a movie - hence the 'Revenge of the Nerds' franchise - but not for hopefully years on the air. It's a sight gag, not a story.

Comedy is similar to hockey... in only one way. You get a lot of credit for assists. So I try to serve whatever the intention is, be it the joke or the story or the scene or the moment or the kiss, even if it's not my joke or moment.

'Entourage' is a great show, but it's fantasy. I spent my twenties in L.A. in this business, and my life didn't look anything like that. 'Big Bang' reflects a side of men that is rarely shown. We see their flaws - all of them.

Scientists are not these guys in lab coats deep in the inner bowels of universities and hospitals with their Bunsen burners. They're the people molding the culture that we live in, the future of our culture, and the technology we rely on every day.

I was the sibling that kind of kept it all on a level when life at home got tough. I did it through comedy, sarcasm and distraction. All families are complicated, but my home life was glaringly uncomfortable much of the time, and it was me that took the onus.

As they say, there are two rules in improv: Never say no, and never ask why. When another actor asks 'Why?' or says no to something you're suggesting, then it's very clear that they're putting the onus on you, because they're not comfortable with it themselves.

I used to know Jennifer Love Hewitt. We lived in the same apartment building when I was about... jeez, I guess it was when I was doing 'Christmas Vacation', so I was about 13 or 14.

You know, I read the papers and I watch the news a lot. I watch 'Dateline' and '48 Hours'. And I think we have a tendency to become terrified of one another, thinking that there is a serial killer that is on either side of you.

It's that one thing that you're passionate about, that you end up developing tunnel vision for and everything else tends to fall by the wayside. Passion is appealing and universal.

Perhaps 'Big Bang' fans feel so protective of the show because it is, despite being a hit show on a big network, something of a word-of-mouth phenomenon.

It's never been a priority for me to concentrate on the likability of the character.

I bought a little hideaway up north, so I'll ship my motorcycle up there. It's much less dangerous than West Hollywood.

People are complicated; you put two of them together and it's generally a mess, but hopefully a beautiful mess.

I was a huge theater geek growing up, and that was not the easiest thing in the world, especially growing up in Chicago, where sports are really the norm. I was always off to the theater at night, from 7 years old on. Friends there in the Midwest who could talk to you about the idiosyncrasies of 'Pippin' were few and far between.