i prefer PC. when people hear me say that they flip. i have my top 11 reasons:
1. dedicated servers.
2. no "sticky aim".
3. free games (I.E. crossfire, warrock, maplestory, etc.)
4. mods.
5. QUAKE!!!! lol
6. MMORPG's
7. serf the web, watch a movie, basically what fastdude said, versatility.
8. better graphics and faster speeds.
9. if you really wanted to, play 3 games like WOW and a couple other games at the same time.
10.easier, but more challenging to aim.
11. don't have to pay for online like Xbox 360
cons- top 5:
1. hackers.
2. can get expensive when first starting off, but most of the time, not really
3. viruses, crashes, etc.
4. failure of components resulting in someone trying to open it up not knowing what they're doing and then breaks something.
5. can't just make a computer. have to know alot about it and you have to know how to put it together. cant just walk into Meijer and say, "I would like to buy a nice gaming computer for around $300."