Tiger '07
Four words: BEST. GOLF. GAME. EVER.
Basically, everything i've always wanted in a golf game. The character creation tool is incredible (I was able to create a character that looked just like me, down to the mole above my left eye), even at the second highest difficulty level I can't shoot in the 50's every round, and at Tour difficulty breaking par is an extreme challenge.
I rented it for a week; it's going to be my next purchase. Now, if EA could just figure out how to make great mainstream sports games (NBA Live, Madden, NHL) instead of just great boxing and golf sims.