First of all, expect a huge flame war in moments, followed by a timely lock and probations handed out to the more rowdy people.
Second of all, PCs are better for FPS in my opinion. I've played FPS games on both PCs and PS2 (which despite being old generation and all, is still a console) and I'll have to say I would never want to give up mouse when it comes to shooting things.
Playing an FPS on consoles was always too much like playing Doom 1&2 to me, where you just turn and don't have to aim much. Sticky aiming in many games doesn't exactly help dispell that feeling, either.
PC FPS are all about reflexes and insightful movements. Console FPS are all about... I don't know. I've only had a chance to play a few of the new generation FPS games on consoles, and I can't say I liked the experience too much. Sure, it's fun, but I'd rather have 'board and mouse, any day.