When I was a teenager in high school, I went to class, studied, went to band practice, went to club meetings, went to work. That was pretty much all I did. And pretty much all I thought about was how to get a good scholarship so I could go to a good college and become a fine upstanding member of society. I was on the right track: I got good grades and generally acted responsibly.
Basically, I was a little grownup.
Now I'm 25. I'm out every night, I get in trouble with my parents for not calling home often enough, I spend money irresponsibly, I dye my hair odd colors. The things in life that currently get most of my attention are boys, booze, comic books, LiveJournal, Homicide, and what am I going to do for fun this weekend.
Basically, I've become a teenager.