My Top 5/10/Whatever is a bit weird. Basically, each game is on the list for very personal reasons, and I have no willingness to argue in favor of any of them.
1. Chrono Trigger
2. The World Ends WIth You
3. Civilization 4 (Series)
4. Mother 3
5. A Tie Between various Pokemon games
6. Yoshi's Island
7. Kingdom Hearts
8. Age of Mythology
9. A Three-Way Tie between Zelda: Ocarina of Time, Link to the Past, and Phantom Hourglass
10. Metal Gear Solid 3
11. Resident Evil 4
12. Kid Icarus: Uprising
13. Portal
14. Fallout: New Vegas
15. Team Fortress 2
Love and tolerate.