I know I'm not the first to S-Rank this game, but man... This feel fucking great.  I got more than 15k deaths, my fingers hurt like a bitch, and I won't probably be able to hold a 360 controller for a week. But I fucking did it. This must be, by far, the hardest, most time consuming gaming achievement I ever got... and probably will ever get. 
 
Needless to say, I will never, ever touch Super Meat Boy again :P