Come on man, of course YOU don't think you are sulky or self-absorbed. But you are. I was too when I was a teenager. All guys get that way at some point. Heck, I turn 23 in less than a month and I still get sulky occasionally lol!
I don't know why you brought up the getting angry thing, as that wasn't really mentioned, but again, guys will get angry at something at some point, some more often than others. It's how you handled it that counts. Not being physical is a very good idea!
It's not really a stereotype, more of just what's going to happen. When I was mid teens I also thought I wasn't sulky or self absorbed, but now a few years later I realize I was. I'm sure 5 years from now I'll realize I acted in a bad manner now about something or the other.
What I'm trying to say is that in hindsight, we all see past behaviors that weren't good. There's no need to be offended about it, but just rather take it and let it "roll off your back".
A few things I want to say in light of the birthday...
1: Keep it in your pants...

your brain might tell you one thing and hormones the other, but usually the brain is correct! Don't do something you'll regret after the fact.
2: When looking at what you want to do after high school, don't let what others thing about a career choice affect what YOU want to do, and what's best for YOU. So many times people go to college because they feel pressure from family/friends to go, when they would be better off going a different route. College is not for everyone!
3: Finally, don't take anything for granted since you are young. Your parents won't be here forever, nor will the people you think are your friends in high school. The people who stick with you in both the good and bad times are the ones who are your true friends.