I just wore my Gengar hoodie, though all I did was play Smash on my 3DS while waiting for Trick-or-Treaters. I think the last time I had worn an actual Halloween costume before that was when I wore the same costume a few years in a row in late middle school through early high school bcuz it was too amazing. I wore a suit and my TD Bank Santa Hat and called myself Santa's Banker.
I think next year if I go out I'll just handmake something based on some weird pun.