I will only list games that I played entirely in 2007. (otherwise, Zelda TP would be number one)
1. Super Paper Mario (awesome, better than the reviews said imo)
2. Tales of Phantasia (one great Retro-RPG)
3. Excite Truck (great game, but the lack of good multiplayer modes is a big minus)
4. Lunar Knights (really funny, a good story and everything. absolutely worth the 20 bucks I spent on it)
5. Final Fantasy VI (another great Retro-RPG. note: since I am only ten hours into the game, I can't really judge it yet. If it continues like it started, it will reach at least place two)
Other games that I entirely played in 07:
Sonic and the Secret Rings
Wario Ware
Mario vs. Donkey Kong 2
Children of Mana
Final Fantasy IV