I'm with you on that. I enjoy games, but at 30 I have a very busy life and only have so much time to play games. I work 50 hours a week, have a girlfriend (who will play rock band and guitar hero, but thats about it), and friends that want to go out. I just don't have the same amount of time to play games that I did 10 years ago (or at least I don't prioritize the same amount of time to gaming anymore).
I find myself playing games that I can pick up for 30 minutes at a time and put down. If it has a save system that I can save anywhere I'm more likely to play it. I really enjoyed the bioshock games, though it took me ages to beat them because I played them in short spurts. If a game has a checkpoint system where I have to get to a certain place before saving, I can guarantee that I won't keep playing it.