I am the guy dressing up in, you know, the caveman outfit for the kids' birthday parties.

It took being famous to make me cool, which, by the way, I never forgot.

I'll never forget one of those things that my father said to me. My father said: 'You know what? We have had so many amazingly positive experiences that we would have never had because you're famous. We can stand to have a couple negatives ones, too.'

One of the interesting things about Twitter is looking how famous people choose to use it. Take someone like Steve Martin, who I follow: it's all sorts of comic gems, nothing private, nothing personal - all jokes. Other celebrities are overtly personal - like Charlie Sheen. I do a mix of observations and updates.

Equality for everybody is great. That would be amazing.

Some actors specialize in shooting weapons and punching people. Some have the market on playing buffoons cornered, others specialize in roles that require heavy makeup or outrageous wardrobe. Some trade exclusively in a post-ironic blase attitude.

I never get bored talking about themes dealing with ambition, leadership and what it means to be an American. I love that stuff. I just love it. I've loved it ever since I was on 'The West Wing.'

Being in a successful marriage is no different than being cast in a successful movie. It's all about who you pick; in that first moment, did you pick the right person? I think you need to pick somebody who's more interested in being married than in getting married.

What's gratifying about West Wing is that everybody told us that it couldn't be done - that the man or woman on the street didn't care about politics. But if you set things up correctly, people don't have a problem with it.

Getting married isn't going to make your relationship better. It's just a ceremony.

I liked being a teenager, but I would not go back for all the tea in China.

I've had years of psychiatry, and I ask about every six months - it's sort of like getting your oil checked - I ask, 'I'm not an actual narcissist, am I?' The learned men of psychiatry assure me that I meet none of the medical criteria.

If you are worried about what people think of you, you should go into politics. Real actors take chances.

In acting, there's a type of courage you're recognized for all the time. You lose 100 pounds and play a guy with AIDS, and you get rewarded. But, in life, doing what is courageous is quiet, and no one knows about it. Courage is someone making sacrifices for their family or making selfless decisions for what they hope or feel.