I was really thrilled to see so much good art, but remind me never to do this again... It took me probably 20+ hours to sort through everything.

I'd like to give a bit of an honorable mention to these two pieces:
https://bitcointalk.org/index.php?topic=5193860.msg53114791#msg53114791
https://bitcointalk.org/index.php?topic=5193860.msg52811173#msg52811173
Because they had no clear relation to the forum, they didn't make the top 100, but they're both very high-quality pieces. I especially like the concept & execution of the first one.