I did, however, dress up and go door to door for a few years with my small cousins, and on occasion I really enjoyed my costume. But it's the same thing that happens with birthdays when you get into your adolescence. All of a sudden the things you used to do as a child become passe. You try extra hard not to be childish, because you want to be cool, and children aren't cool. So you no longer hire clowns and moon-jumps for your party, and you no longer go to Kmart for costumes in mid-October.
I will tell you all the costumes I remember:
I don't have a lot of important Halloween memories. It's just never been a meaningful day to me, even when I was a child. I assume that's because Halloween is the most social of holidays and, since I was a socially fragile child, I did not take to it as I did Christmas or any other consumerism-based event.