I love the lack of responsibility for others. I don't have to do anything I don't want to (except work, obviously) and I don't have to answer to anyone. I'm smart enough to make the wise decisions and also enjoy the benefits of choosing well.
However, the lack of money things is a huge dilemma. I don't know if growing up helps that, obviously a spouse would make that better, but then kids suck you dry. So I don't know if growing older will make a difference there.
life isn't ever perfet, so I guess trying to make the best of it is your only hope of joy.