Oh so manny. hard to choose one. or two, but well, atleast ill put Final Fantasy 8 here.. played it on PC, only "bad" thing about it was the enemy scaling whit you.. Everquest and Everquest 2 for the MMO category.

there are moore but ill stick whit these for now.

umm do you mean Knights Of The Old Republic?

oh ok thank you

Temple of Elemental Evil.

I would have to pick Freelancer as the best RPG in my paltry RPG collection. The game itself had a lot of potential, and when hooked up with one of many mods, fulfills most of that potential. And it involves spaceships, which is always a plus.
Fallout 3 would come in second, mostly because it has a whole bunch of little things which add up to be a big pain. What with the "game over" at the end, the (IMO) annoying real time combat which uses dice rolls (seriously, if I aim somewhere, I want to hit there, not where a random diceroll tells it to go, if it were merely a spread radius I would be fine, it just handles it really badly what with the bullet swerving away from the target.) and some areas the lighting was very bad, especially on the player. At some points, the lighting was so bad the weapon and arms of the player showed up completely black.

Cel, +1, for the heretic quote

I think Deus Ex can be classified as an RPG however like Demigod, it is a cross between "pure" genres. 

But I definitely see the point that it is an FPS with RPG elements, however the elements were fantastic. Morph, as Ryat mentioned Deus Ex was fantastic, DXII sucked - they removed the best parts of DX1 and consolized it.  They are currently working on DX3 with the promise that it won't suck.  We'll see though.

Some great games have been mentioned, bards tale is definitely one of my all time favorites, along with the eye of the beholder series, ultima, NWN, M&M, Oblivion etc.

A couple the I loved that aren't on here as well are:

Master of Magic (c64) was great to play, i think someone on the forums here uses the MoM cover art as their avatar,

Dungeon Master (Amiga) was a classic as well.

Stonekeep (PC) was just a lot of fun but more hack n slash as opposed to role playing. 

Morpheas: you seem to have missed the tongue-in-cheek nature of my post I thought the "get off my lawn" comment made it obvious enough, but apparently not. Anyways, it *is* a brilliant RPG and highly recommended if you value openness of action, though even the best interfaces seem painfully outdated graphic-wise by today's standards.

Alway: Freelancer isn't an RPG, it's a space sim. If you liked it, I'd recommend you try X3, I have Reunion and its excellent, and I've heard Terran Conflict is even better.

Though I must say I'm somewhat dissapointed at the lack of mentions for Jade Empire. Both its successor Mass Effect and its predecessor Knights of the Old Republic have plenty of votes, but no love for good ol' JE? c'mon, people, it certainly wasn't *that* bad.

if it counts as rpg, zelda, OoT in front of LttP. else, gothic (1st one, 2nd wih addon in close pursuit, forget about pt. 3).

Ultima V and Fallout 1-3 (although FO3 is the odd man out here I loved the game for its atmosphere).

Planescape: Torment should also get an honorable mention.

How is nethack not an RPG.  Are you not role playing a character?  Every selection is very different unless you just melee the whole game, which you should have noticed you died a hell of alot faster as a mage  

Yes Jade Empire is really good but.... not one of my favorites. KOTOR was just better.

Although these are different games (not sequels) they are from Bioware and that says it all

I think Jade Empire deserves an honorable mention.

We have a lot of votes on KOTOR and DeusEx he he

Yeah Spellcraft is really nice! i havent played the first, but i have Spellcraft 2 and it is really good imo.

A short answer to this question is Phantasy Star Online.

Or maybe Rhapsody   (Sarcasm detector is going off)