Best PC Games? + Requirements

I am a heavy console gamer, but loads of my friends are saying that I should upgrade my PC so that I can play PC as well as consoles. Now... I do not really keep track of the PC games so am stuck to find if there are any games which I would be able to get that are really good. I think that my PC is not that great, but it does some games, so I will need the reqirements. If you can reccomend a game then I will look it up and see whether to get it. Thanks

for the record here are the status quo best games EVUR:

display pattern: game name (system req.)

diablo (umm u have a pc)

warcraft 2 (umm u have a pc)

half life (umm u have a pc)

doom (umm u have a PC)

quake (umm u have a PC)

duke nukem (see above)

cs 1.6 (pentium 3 or amd eq. 512 mb ram, ati 9500 series or better or nivida eq.)

WoW (pentium 4 or better, 1 GB ram, ati 9 series vdeio card or nivida eq.)

final fantasy 7 (umm u have a pc)

starcraft (see cs 1.6 req.)

diablo 2 (see cs 1.6 req.)

flight simulator 98 (umm do u have a recent PC(1-2 years))

carmaggeddon (umm you have a PC)

thief 2 (unknown)

anything other than this is really a matter of opinion.

I'm kind of new to the PC gaming too, but there's one great game, Mass Effect. Req: Processor; 2.4 GHz. Memory; XP 1 GB RAM, Vista 2 GB RAM. Hard Drive: 15 GB. Video Card: 256 GB and Direct X 9.0c.

If your comp meets the requirements, it's definitely a game you should look up! :)

I would like to point out a few good titles, and I will stay away from multiplats.

Vampire the masquerade: Bloodlines (its kind of a mix if fps, rpg and other, quite good)

Deus Ex

System shock 2

I would say "The witcher" but altho it can run on a p4 3.0 ghz, with 2 gb ram, and something like a gf6800, which I do not know if you have, It wouldnt run too good if its an old comp.