im with blackchaos, I was a big sony fan up until the point they totally gave the cold shoulder to people who purchased the HDD and dropped all support for it, i was bitter at that point but still liked ps2. i owned an xbox and will admit i paid for a system JUST for halo and halo 2. there were no other games i really liked for it besides ninja gaiden.
i preferred PS2 over all but played xbox more because of halo 2 online.
when current gen came out, I only wanted the 360 for halo 3.
But that quickly changed when i saw many trailers of what was to come and i now have many reasons to own a 360 and love it, I love the live system, its so simple and easy to use and they are always making it better.
Marketplace is a dream, tho i dont agree with paying money/MSpoints for fuckin pictures.
The media center connection is awesome as well, i love watching movies ive downloaded on my PC from a stream (which after i modded my xbox 1 was the main reason i used it besides halo).
Gears was awesome, But i admit was not AMAZING as most have said. Its up to par with halo but i will still love halo till the day i die, its like football night with the guys for other people, for me. I love gettin together with friends, linking up and going to town on some kids.
Crackdown just came out, but i beat the game before it hit store shelves lol, And i STILL play it. That game is crack. literally. Boring lackluster story but fun as hell gameplay.
Dead rising....can i say too much replayability?(tho the replayability is forced on you if you want everything due to one save spot and limited time to get missions done.)
Oblivion...my first game to 1000 points and i still am sure i have not seen the whole world.
Theres other games, and sure not all of them are exclusives but they were other perks for me buying the system, when at first all i had was halo 2 to play for awhile.
i look at PS3 and i wonder what happened, it doesnt have the same feel i had with ps2, no good games out right now and i didnt really HUZZAH! for resistance, and every good game ive seen listed with the exception of FF13 is coming to 360, (MGS4 is supposed to hit 360 a few months after ps3,tho i dont like MGS series).
as of right now, 360 is where its at. And i do not see me owning a ps3 for a long long time, Ill own a wii long before then.
Edit: i also wanna add that the 360's achievement system adds so much to the playability of games, and its an awesome idea. Games i would never play get play time from me because i wanna unlock some achievements. Most game review sites say when they go home to play a game, its always a rush to see whos taking home the 360 versions because of the achievements. That system has breathed life into games that may have never seen the light of day, and makes playing most games even longer than you would have before, usually id beat a game and be done with it. Now i complete a game and stick around to earn all the extra achievements which usually takes longer than the game did. I LOVE achievements.