Yep, I'm looking for some long lost PC gems I missed out on in years gone by. :) My current shitty PC can't handle anything recent, it even struggles with C&C: Generals at anything higher than 10xx by 7xx.
I love RTS games, my entire PC game collection is pretty much made up of C&C titles. Never tried any FPS type games on my PC since I'd imagine using a keyboard+mouse would make it rather difficult.
Hitman: Codename 47 is the only name on my mind right now, simply because I enjoyed playing Hitman 2 on my PS2. Still have to get around to playing Contracts and Blood Money, kinda got bored after beating every Hitman 2 mission with highest rating!