Started playing Deus Ex: Human Revolution. Was having fun and pretty amazed at the graphics, but its subtle references and being in that world again made have to go back and start playing the original Deus Ex, some 15 years after the first time. Damn if I'm not having fun again. (Well to be fair, it is my fave game of all time.)
I don't know if I forgot some of the details or if the PC version's different than PS2 which I originally played, but there's stuff in there I'm still discovering even though I've played it through at least 3 times before.
No videogame has ever been more perfectly suited to fans of paranormal/conspiracy/futurism topics (i.e., this crowd).