I <3 Steam.
So far I have bought...Oblivion GOTY, Fallout 3 GOTY, Trine 2, Brink, Borderlands GOTY, Bastion, Portal 2, Mass Effect, Mass Effect 2, Humble Bundle (with Super Meat Boy), Torchlight, The Witcher, Dead Island. All have cost me roughly £60 or so. Which is just incredible value.
Some I've got and played before on console, but have always wanted the PC versions though and for 1-5 quid each, worth every penny.