My wife and make a big deal out of Halloween for the neighbor hood. Since our house has walkways on either side, we have the kids walk into the back yard to get candy, it's all dressed up with a grave yard, body parts, skeletons, strobe light tunnel and spider web tunnel. It's a big hit.
I usually go as a skeletal warrior complete with MR Light-saber. I usually scare the dickens out of people when they walk past without seeing me. There's just something about the sound and visual of an igniting saber in the dark that gets most people.