I'm a single parent and I just found that it was too difficult to manage raising my kids and doing the traveling involved in making movies. So I took a little bit of a break. And the little bit of a break turned into a longer break, and then I found that I really didn't miss it.
On the last couple of movies I made - big-budget Hollywood movies - I really missed being able to create my own material. In the early movies I did, I was brought in to basically rewrite my stuff, whether it was Ghostbusters or Spaceballs. By the time I got to the point where I was "starring" in movies, and I had executives telling me what lines to say, that wasn't for me. I'm really not an actor. I'm a guy who comes out of comedy, and my impetus was always to rewrite the line to make it funnier, not to try to make somebody's precious words work.