KotOR, that was among the best console RPG's I's ever played. It was fun, lots of ways to go about things, and you got the best of starwars in there (lightsabers and wookies). I still wish they'd make a KotOR 3 instead of going for the MMO, but yeah, it was great. Also like someone else mentioned, HK-47 is arguable the worlds most memorable character, he's such a passive-aggressive ass, you have to be dead inside not to love him.
Also, I was not a major fan of mass effect. Honestly between the glitches and the stupid vehicle sections, I couldn't even finish it.