1 suikoden 2
2 mass effect trilogy
3 final fantasy 7
4 chrono trigger
5 xenoblade
6 dragon age origins
7 last story
8 star wars kotor
9 xenosaga trilogy
10 final fantasy 10

havent played many but the only two I would mention are:
1) monster hunter
2) demons souls

.... rest are crap, like mass effect, dragon age origins (and thats supposed to be the better one), pokemon, deus ex and skyrim. I would leave my list blank rather than put them on.
ME story was cool, but didnt have the gameplay to go with it.

Looking forward to soul sacrifice, but I wont be opening my ni no kuni wizard edition anytime soon.

I'll only consider JRPGs.

1. Final Fantasy X
2. Dragon Quest VIII
3. Kingdom Hearts I
4. Kingdom Heart II
5. Dark Cloud 2
6. Persona 3
7. Pokémon Blue
8. Paper Mario
9. Paper Mario: The Thousand-Year Door
10. Final Fantasy XIII

Why am I the only one who has Dragon Quest VIII in his top 10??

Amazing game.

I remember buying it for the FFXII demo alone. I had no idea what the Dragon Quest series was and I actually didn't like the game at first. I thought the gameplay was boring. But I tried it again a while later and once you get past the generic beginning it gets super awesome. You should definitely play it soon. And before Tales games -.-

1. Planescape: Torment
2. Fallout 2
3. Might & Magic VI
4. Baldur's Gate 2
5. Gothic
6. KOTOR 2
7. Vampire: The Masquerade - Bloodlines
8. Wizardry 8
9. Morrowind
10. Fable 1

Since I haven't played much...
1. Paper Mario: TTYD
2. Paper Mario: TTYD
3. Paper Mario: TTYD
4. Paper Mario: TTYD
5. Paper Mario 64
6. Paper Mario: TTYD
7. Paper Mario: TTYD
8. Paper Mario: TTYD
9. Paper Mario: TTYD
10. Paper Mario: TTYD

Final Fantasy VI
Final Fantasy VII
Planescape Torment
Shadow Hearts :Covenant
Diablo 2 + LOD
Suikoden 2
Persona 4 Golden
Baldurs Gate 2
Star Ocean 2
Parasite Eve

The list is in no particular order , plus I missed a heap of great series let alone single games that could have replaced many in that list ,top ten is so hard for rpg's

1. Grandia
2. Person 3 FES
3. Earthbound
4. Tales of Symphonia
5. FFV
6. Paper Mario: Thousand Year Door
7. Chrono Trigger
8. FFX
9. Pokemon Red/Blue
10. Grandia II