I think you've touched an interesting point, Matt
I don't know exactly if Dan does miss his life without the acting and such or if he doesn't because like House says 'Everybody lies' and I don't think that our Dan doesn't.
However, he does look like he's enjoying himself with all of this 'business' and that kind of makes me think that he does not miss his earlier life. But then again, he did say in interview a while ago that he didn't feel that well when he was with people of his age, or if he didn't say that it was something that sort.