well, you're graduating or have graduated high school. will be or are starting college. you'll get in less shit for sex and drugs, and it's your last year free of a permanent criminal record, if that's your thing. people start taking you a bit more seriously. you probably get to stay out later and go more places, get a slightly cooler job. basically, you can start dismantling your training wheels and you don't have to take life seriously yet. enjoy it dude.