I have to say that I love the energy that comes with the children dressed up going door to door. The excitement in their faces as you open that door and they say "trick or treat".
I also love that for some, it could be their very first time dressing up...whatever the age. My husband's grandmother a few years ago dressed up for the very first time as a witch. She was down visiting one of her sons who helped her get a witch's outfit and painted her face green. She went around for the rest of the night with such glee that she got to dress up. She was 75 years old when she did this.