In addition to always having been strongly drawn to the autumn mood, (must be my Celtic DNA), I do it because some kids have crappy lives and if I can make them forget it for a little while and put them in a little fantasy world for just a few minutes when they come trick or treating to my house, then it was all worth it. I do it for others, mostly, to cause a little delight in the neighborhood. I know some kids will always remember that one house in town that always had the cool lights and skeletons and the lady who lived there always dressed up as a witch. I'm hoping to contribute to some fond memories, I guess.