I thought turning 18 was overrated. I've had way more fun since I turned 21 than I ever did as a teenager. The only memorable teenage birthday I had was turning 16, because I got a car and I love driving.
since im only 18, and in my last semester of high school... which is awesome, dont do anything and party all the time.... 18 is sick so far, so probably 18... but 16 was dope to get a car as well.
I'm 19 and I definately would have to agree that the end of senior year in high school, summer before college, and the first semester of college were hands some of the best times of my life.