Oh man, those last 3 posts had some great choices!
Super Mario Sunshine was a blast to play. It felt like a better 3D Mario game than Super Mario 64 did to me, SM64 was just too big and empty for me. And the controls are infuriatingly touchy. SMS is also just a gorgeous GameCube game.
SW: Battlefront is just mass chaos unleashed upon the Star Wars Universe, and I love it!
And Oblivion is my 2nd favorite game of all time, right after Super Metroid. I 100%ed achievements on it, beat the main-quest and all guild quests, Shimmering Isles story, and The Knights of the Nine storyline. I feel, even after exaustively playing Morrowind and Skyrim as well, that Oblivion is the greatest Elder Scrolls game.