2003 was a great year for gaming. Wind Waker is an obvious winner of GOTY for me, and I also enjoyed Viewtiful Joe and SoulCalibur 2 on Gamecube. I do remember The Simpsons Hit 'n' Run, though it still didn't capture the same Simpsons magic for me that Konami's arcade game did twelve years earlier. I played the PC version of Jazz Jackrabbit back in the 90s when it was new. Before they did Jazz, Epic MegaGames did a platformer called Jill of the Jungle that I played as well.
One other 2003 game I played was the first Xenosaga. Unfortunately, although KOS-MOS was an iconic character, the game itself didn't quite live up to Xenogears, as it played more like the second disc of Xenogears than anything else. Xenosaga was the weakest of the three Xeno series. :(


