Test Drive Unlimited. Came off the back of having played GT5, first thing you do is drive a Ferrari California and right from the first wheel turn I knew this was going to be a bad game. Lucky for me I didn't get far enough it to the game for the woeful car physics to kill it totally, instead a bug that made my car start jumping like a Mexican jumping bean and could not be resolved by changing race, reloading and had occurred on the third race I took part in put the nail in this game for me. Sent it back and got a full refund, thank you distance selling rules.
Worst game I kept, Black Ops on PS3, why the hell did I buy this game on console I will never know, either that or Spore.