I just finished Grim Fandango yesterday. It only took me a day, because I just got addicted to it. Definitly my favorite game.
Im also trying to get my hands on the original Sam and Max, with not much luck. After christmas Im downloading the first episode of the new Sam and Max thing, Culture Shock.
I'll be plugged to Oblivion and Gears by then, so alot later after christmas.