I was invited to a New Years' Harry Potter costume party in 2009-2010. I went dressed in white robes, a wig with long white hair and a long white beard. I also had a staff with a crystal sphere for its focus at the top, and a sharp industrial shape to its gun-metal composition.
People thought I was Dumbledore until I noted the staff. "Who are you," they would ask. "Saruman," I replied. "But why? This is a Harry Potter party." I quipped, "Out of this entire assembly, I thought we needed a good character. A good wizard, at the very least."
Hermione is my favorite character-- she mirrors me in a few ways, hence she's easier to relate with than the titular character. I think the series is good as a work, but I dislike the banality of wizardry as a matter of taste.