just buy everyone fallout 3 who doesnt have it of course
I don't have it. The interface is too obviously designed for consoles. If I want to shoot someone's leg off, I'll do it with my own gun, not some stupid device that stops time and automagically aims for me. I know I don't have to use that feature, but it's the principle of the thing. Also, I'm more of a hardcore gamer, and the FPS part (which is the main reason I'd buy it, seeing as I'm not a big fan of RPGs) don't seem developed enough to match more hardcore games. I'm perfectly fine with my current FPSs: Crysis, Half-Life 2, and two dozen or so mods for Half-Life 2.
Also, in response to the OP: I'll take Fallout 3, please.