I can't FPS without a mouse..
I know, on a consoleforum everybody must be laughing here, but my struggle getting that cursor a little above the torso must feel equal to the struggle some of you have with too many buttons.
For that reason alone I would pick a PC. But I have many more, stick around!
I have the feeling that a PC brings more feeling into the game. This is because you are closer to the screen and sound and the game can just suck you in!
Also, The struggle some have with too many buttons... I need them! I even added a G13 keyboard to add 24 more buttons! I use shortcuts all the time to speed up a game. Specially RTS and some RPG.
This brings up another point. Customizing..
A pc lets you customize your game a lot more. Assigning buttons for one. Most console games only have a few pre-choices, but that's it.
And have you ever noticed how "bloom" can kill graphics at some games?? (Cough, need for speed, cough)
Some minor points..
I have a 3d monitor wich I can only use on PC. There is more third party hardware for PC. Logitech and Razor alone have a full scala of products to help you game better. PC-Games are generally cheaper, maps are downloadable for free and mods are available for about every game.
O! And not to forget, the thrill of checking what you can handle after every upgrade! Upgrade your PC and you'll notice that you get back to a few older games to see if the graphics have improved for you! Great fun!