An analyst of Dumbledore.
Is (canon) Snape really ugly?
Is there any chance of real/canon Harry/Draco?
I've not been in very many fandoms, but Harry Potter is the first one I've been in that has such smart fans. I love how we can have intelligent, mature conversations about characters and storyline details. I love how even after being in the fandom for a half-year I can still discover wonderful new fans with interesting ideas. And, though I do little writing myself, I take pride in how other fan authors are so much better than the creator of our source material; we've improved on JKR's ideas, we've explained and covered or rewritten plot holes, we've taken one-dimensional characters and turned them into full, believable, real, complex "people".
I'm so proud to be part of this fandom.