Most games i wouldn't count as RPG. Especially if it has a linear fixed. A few of Bioware's i barely qualify as RPG, this includes KOTOR, and Jade Empire (haven't touched many others recently). They were fun, and had some RPG elements, but only 3 options when you talk and no matter what you choose didn't really change the storyline/outcome at all.
Are you serious? How much can you define your Revan in KotOR, and how much can you define your Champion of Cyrodiil in Oblivion? How many possible endings does Oblivion have? How many dialogue options with consequences does Oblivion have?
In some games you can't even attack anything that wasn't a monster (In KOTAR, i whip out dual lightsabers in a bar and swing them around. No one reacts, gets hurt, or even cares... woot).
That's because it is not a sandbox world, like GTA or TES. A linear world have a lot of strengths (capable of being epic, capable of cool events, and a great story with lots of choices) while a sandbox world has other strengths (Freedom! Do what you want! Revisit old locations, and continue playing after you finish the game (often).)
You cannot slaughter anyone you want in KotOR, and you can never choose satisfying dialogue options in Oblivion. You might be roleplaying when gathering Cliff Racer plums to get rich in Morrowind, but you're also roleplaying when you're deciding whether or not to regret sending your troops into death in the past in KotOR 2.
Linear and non-linear games are two completely different things with different strengths and different weaknesses.
I'm looking forward to Dragon Age 2 and Skyrim equally, because in DA2 I will get to direct the life of Hawke and see how his relations with his family and friends change over a decade (with the addition of party tactics), and in Skyrim I will get to explore the Nords homeland, be free to loot dungeons/homes/ruins, progress, and save the world from the mighty dragons (with the addition of beautiful, thrilling FPS combat!).
BTW, the day Bethesda add a similar dialogue system like the one in Mass Effect to TES is the day where dialogue in TES actually gets interesting. The voiced PC and cinematic dialogue really hits the spot. A Bethesda+BioWare co-developed game, where BW makes the story and dialogue and Beth makes the free game world with adrenaline-filled combat and high-end graphics? One can always hope.