FAVORITE RPG
I'd say
Mass Effect 2 qualifies. My favorite used to be
Dragon Age: Origins, but there's something about ME2 I really, really like.
My "favorite RPG" tends to change rapidly. Before DA:O,
Knights of the Old Republic was my favorite, but not anymore.
I absolutely hated
Neverwinter Nights, but I doubt that's a surprise to anyone here.
I tried
Morrowind, but I didn't care for it. The game wasn't bad in of itself and it was really cool to mess with everything. But it lacked a cohesive story (if any at all) and was too focused on exploration. Exploring is fine, but I prefer some sort of direction in a RPG. That doesn't mean I want to get locked into a story without any choices or freedom (like most Adventure games), but there needs to be a middle ground.
I played few RPGs before
Baldur's Gate 2. Most of the pre-BG2 games were first-person and moved about one screen at a time. Those old games were clunky and overly complex in many ways.
(Rath, you don't need to memorize names and places in DA since your journal and codex store all the important information.)
RPGs ON THE PC
I'd say there are quite a few RPGs on the PC or at least games with RPG-like elements. It's not a stretch to say
Deus Ex is an RPG. If
Mass Effect, which is played through real-time action-oriented combat, is considered an RPG, then games like DX are definitely within that category.
I suppose the question really is: what makes a game an RPG? Is it stats? Environment? Game play?
If it's based on stats, some people could stretch the definition of RPG to suit just about ANY game.
Team Fortress 2, which is NOT an RPG by any stretch of the imagination, has weapons that affect the character's damage, resistances, bonuses, and so on. But that'd be classified an RPG if going purely by stats (or weapon stats, I should say).
Some people consider
Diablo II an RPG while others say it's an action game. It's both since it relies on real-time action combat, but has stats and items that affect the character (like ME1/ME2 or DX/DX2).