Please give one advantage or disadvantage per answer (then we can see through votes what people think the most significant ones are).
Try to avoid vague or subjective answers like "because the games are better". If you want to give reasons like "Advantage: because you can use a mouse on PC's" add a qualification/explanation of why this is better, like: "a mouse makes accurate aiming in first person shooters and unit selection in real time strategy games easier".
I'll put in a few myself for starters.
(Note I asked this on SuperUser, but it got deleted for being game related, so asking again here).