I might just go ahead and play clear-sky with the graphics down. I had a love/hate relationship with Shadow of Chernobyl, and Clear Sky is a little buggy, but still an awesome, unique game.
I might play through Fallout 3 again, from the beginning.
I never played the first F.E.A.R., is that worth checking out? I played the demo for the second one and I didn't really like it. The demo for fear 1 scared the crap out of me though!
Any other suggestions?