Deus Ex 1 and Bloodlines are pretty much the only video games I've actually completed, they're both amazing games.
Oh, and I finished Deus Ex 2, but it was nowhere near as good. I can't really go into depth why because it was a while ago that I played it.
But yeah, looking forward to Bioshock. Couldn't play system shock 2, the controls were too weird for me or something.