As much as I loved Vaas - he really was a great villian - Jack, for me, was the star of Borderlands 2, followed by Tiny Tina. I wouldn't have minded if she won one of the character awards as well. Borderlands 2 gets all the credit it deserves.
Also thought the Walking Dead deserved their awards, it was a very well told story (even though I laughed a lot more at B2
). But I don't think it's GOTY.