Half-Life: Opposing Force, Half-Life: Blue Shift, Half-Life 2: Episode One, Half-Life 2: Episode Two, Half-Life 2: Deathmatch, Half-Life 2, Mortal Kombat 4, Virtua Fighter, Day of Defeat: Source, Counter-Strike: Source, Half-Life, Battlefield 2, Mortal Kombat, Virtua Fighter 2, Dynasty Warriors 4 Hyper, Call of Duty 4: Modern Warfare, Portal, Mortal Kombat 3, Mortal Kombat II, Mortal Kombat Trilogy
As you can see the majority of my PC games are FPS. That's pretty much all I use my computer for. I can't stand using a game pad for aiming my crosshair in an efficient way like I can with a mouse. It's more convenient, and shooter games usually require more control buttons than a game pad has to offer. Plus to shoot, you need good sight and that calls for good graphics. PC's are where it's at for FPS (third person shooter type games too).