I put much more effort into this one. :) I have the proper tie, scarf, and wand in addition to the stuff from the Ravenclaw costume. Basically I decided I fit the Slytherin profile better than the Ravenclaw one, so I gave my old scarf to my Ravenclaw roommate and made this up for myself.

It's a little less "generic" than my others at this point... the character is ME so there's more of a personality there. The wand is specific and I've got those terrible boots instead of the normal shoes, etc. I'd like to improve on this more... there's still one book and a few movies!