I like how adulthood makes you more mature, the problems is that many people (within my age group at least) don't pick up that part of adulthood till much, much later (or I'm just odd). People lose their childhood innocence too fast. :/
Plus most adults wouldn't chase each other around and play games together
I never wanted to grow up. I used to think that all the kids my age who couldn't wait to grow up or be a teenager were ridiculous. I'm still the same way. The future may have a lot of possibilities, but so does now.