It's not the most glamorous victory, but I'm stamping "finished" on Street Fighter IV simply because I was able to beat the game with one character on the easiest setting with only one round matches and the credits rolled soon after. I've even played a few random online matches and won my first one (after I lost, like, the first 10).
I think, up until the game's release, I was rather tepid about the game overall. It wasn't until I got my hands on the controls that I realized it played almost exactly like Street Fighter II Turbo Championship Edition, back in the SNES days. Soon after a few rounds of fighting, I knew I had to get the game again.
Oh, I'm far from being a threat to other players...but at least I can make a dent before going down.