Love Dragon Quest 9 too, one of my favorites as well. I dabbled a bit in Dungeon Defenders too, that game is like crack.
Majora's Mask is my favorite Zelda, along with Twilight Princess. I also love Ogre Battles, talk about a game that was ahead of its time!
Wow, nice list, I can safely say I love all of those, except for Wings and the Lost Ocean which I haven't played. Xenoblade was absolutely marevlous.
I think everything made by Valve is sort of implied anyway. :D
If I had to actually make my list, it would be like this:
1. Final Fantasy Tactics Advance/Fire Emblem Awakening (Trying to decide which one I like more.)
2. Legend of Zelda: Majora's Mask
3. Final Fantasy 6
4. Skyrim
5. Luigi's Mansion
6. Pokemon Emerald
7. Kingdom Hearts: Birth By Sleep
8. The Walking Dead 1-5
9. DragonQuest 9
10. Metal Gear Solid 2,3, and 4.
Honorable Mentions: Portal, Portal 2, DragonQuest 8, Ni No Kuni: Wrath of the White Witch, Pokemon Colosseum, Call of Duty:2 and Call of Duty 4, Borderlands 2, Soulcalibur 5, Persona 4, Fire Emblem Radiant Dawn, Super mario World, Super Meat Boy, Streetfighter 4, Final Fantasy Tactics A2: Grimoire of the Rift, All Pokemon games, Castle Crashers, and Final Fantasy 9.