I do NOT own every set ever made. I just started in 2010.
Can you find Voldy in this picture?
This shot is a little closer to help you out:
This is what he looks like (but I moved him, so this isn't where he is in the above pictures):
Here's Harry playing quidditch:
Harry dressed up for the Yule Ball, and Dumbledore:
The trio in Diagon Alley (that's Mr. Ollivander on the right):
Teachers* (Flitwick, Snape, Hagrid, Dumbledore):
Luna is riding the Hogwarts Express:
Hermione is reading the newspaper on the train:
Draco got stuck pushing the food cart (ha ha):
What on earth? How did Sensei Wu get in there?
Crazy Bellatrix! (and Fenrir Grayback)
And of course (part of) the Weasley family:
Just because I pre-ordered two of the three new sets already does not mean I'm obsessed. I just happen to like Harry Potter. And Legos. And Harry Potter Legos.
*Some of the characters, including Snape, came with a cape/cloak, but the papery cloak things annoy me, so I took them off. Only Voldemort gets to keep his on.