Let's see...I own:
~ all five HP books (and soon the 6th! )
~ all three HP movies
~ a black t-shirt that says "I Solemnly Swear I'm Up to No Good" on the front, and "Mischief Managed" on the back (it hasn't arrived yet, but I can't wait to wear it when it does! )
That's it for me.
Nightcrawler is a purist (I mean that in a good way!! )...I suddenly feel so commercial.
I left out something...I also have those two guides by Galadriel Waters...one that reviews books 1-4 and a hints guide for book 5. So sad.