Well, I'm assuming that you already have an xbox, and you're just thinking about getting a Live Gold subscription.
In which case:
pros:
•Getting to find the cool people amidst the trashtalking 12-year-olds who are better than you because they do nothing but touch themselves and play Xbox all day.
•Playing online makes a lot of games actually WORTH the $60 you pay for them
•Eventually getting good enough to lay beatdowns on aforementioned trash-talking 12-year-olds.
•Possibly being lucky enough to play with the awesomeness that is ME.
cons:
•having to pick out the cool people from the trashtalking 12-year-olds who are better than you because they do nothing but touch themselves and play Xbox all day.
•It sucks ass being the noob in any online competition, but especially in FPS's on XBL (see above point)
•Possibly having to play with the annoying asshole that is ME.
Now, as to games for XBL:
Gears of War (both 1 and 2, if you like the first one enough: These are pretty much all I ever play)
Crackdown
Burnout Paradise
COD4
and since I don't want to be Toki's friend, I'll stop there.
