On top of his improvement (or more aptly, scheme improvement), he seems like a genuinely good guy. Never heard him in interviews before this year, but now that I have, I'm rooting for him more than earlier.
http://www.buffalobills.com/video/videos/Aaron_Williams_goes_PINK_for_BCA/633bcce6-d8dd-4a15-a2dd-1e4ebcb7a12c