Street Fighter in general. From twenty to ten years ago, I used to be fairly well known in the local circuits-- a local game shop used to print out my receipts with an embarrassing name because I was the local champ.
I developed arthritis around 2003 and that was the end of it for me. I can still beat down a lot of the kids that challenge me, but I'm certainly not up to the spec of the best players-- even at the regional level.