As far as responsibility and partying, I would say 25. It was right before I met my wife, I was living at the beach with two college buddies, was making good money, and did whatever I want. Now, at 31, I am married, make fat money, pretty much do what I want, and me and my wife have fun. So I'd say now honestly. I'm sure when I have a kid, that will take the place of now, and that will be my most fun age. It seems to keep getting better honestly.