I try to refrain from posting every cosplay gallery link I come across for obvious reasons, but I thought i'd share this one because it features obscure characters and some seriously well-made costumes.
Among the characters present: a couple of creatures from They Live, Priss Asagiri from Bubblegum Crisis anime, a scary Little Sister from Bioshock, and a strangely fitting female Rule 63 Aquaman. Which costumes did you like?
Link