I loved trick-or-treating when I was little, then at about 13 I stopped. Then around 15 or 16 I started going with friends again, but not dressing up. Then I dressed up for senior year in high school, but didn't trick-or-treat.
Oh, btw, Halloween in college is completely different.
Guys all try to dress up and go as a theme (That 70s Show, the Flintstones, etc), and girls are usually dressed slutty. There's often themes like "CEOs and Business Hoes," "Romeo and Juliet," etc. And instead of candy, there's jello shots and jungle juice.