I just want to add my 2 cents that I hate steam atm... I was done and dusted with PC games.. tried to get back into WOW and did until Cataclysm came out then cbf with it, and had a few other games to try and tickle my fancy but didn't, I was all set to give up on PC games then and do something else (P.S. I know WOW was a bad idea, but I had the spare time during the week..). Then steam had to go and put the likes of Mass effect 1&2, Batman, Witcher, Borderlands and the likes on sale and *Bam*, my interest in PC games is there again...
Btw in case anyone wants to know, played through Mass Effect 1 (bought a few other games including the ones mentioned earlier) and it has to have the best story line of any game I have played. Starting on Mass Effect 2 soon and have high hopes as well after seeing the intro and about 15 mins play of it!!