CS:S for life.
I stopped playing TF2 when they revamped it. Added in haircrosses, hats, etc.
It went from a challenging game to a sissy game. In fact, I used to scrim professionally when I first joined eGO under the guidance of Scrappydoo/Nurse, whom I miss dearly.
Thank Satan for a revamp of CS:S, they're releasing an entirely new game for it.