sunshinetoday:

Q: Who do you reckon would be the most fun that you’ve ever got to play?

David Duchovny: Fun as an actor doesn’t necessarily mean laughing on set and goofing around. Fun is what enlists the most of you when you go to work and how involved you can get and how deeply you can get into something. So playing something like Mulder to me is always a challenge. 

The fun of it is to make this guy as real as possible in these situations and that’s … I would say that’s the same kind of challenge in Californication. It’s like an absurd situation. How do we make it as real and emotional as we can? So I think those were always the challenges that I’m looking for.