I just picked up a Nyko Zero Wireless controller a few weeks ago with the full rumble support. Its amazing how much more it adds to the overall feel of the game. It only works with GTA IV and GT5P so far.
Its pretty cool though when driving drunk its rumbling or thunder in the background. Not to mention when you hit stuff etc.
In Gran Turismo you can feel a slight rumble while the car is idling then when you take off it really starts rumbling as long as you've got a fast car.
Personally I love the Xbox 360 more due to the games library, but the PS3 does have a few titles that I especially like (Gran Turismo 5: Prologue, Metal Gear Solid 4 etc) and it does make a nice Blu-Ray player, though that isn't my priority yet since HD DVDs are butt cheap.
wow. post #19 by mattiedashark (or whatever your old username was ) says it all.
i guess another reason why i like the ps3 more is i couldnt give a s**t about online play. yea its nice and stuff but im not g33ky enough to use it 24/7 and dont care about the features of it. for example: if i ever got cod4 all id want to do online is run about killing people. i dont care about invites, chatting, or any bs.