I have some hopes for Dragon Age III, because I see some potential, but I'm skeptical, because I didn't particularly like either predecessor.
Potential because, first and foremost, the game seems to be about the mages vs. templars conflict. This can make for a much more original, interesting story than your generic "save the world from evil" story that plagued Dragon Age: Origins. The big theme, freedom vs. security. Moral ambiguity. No good vs. evil conflict. Perhaps slavery and the Qun both play a major role as well, because both fit to the same theme, freedom. And so would the Dwarven caste system. Ending slavery, that would be something that would motivate me much more than fighting some arch demon. And, by the way, Game of Thrones should have proven by now that even fantasy fans like stories that are about something else than saving the world from evil.
Oh, and BioWare said (I believe) that Dragon Age III will be more open-worldish, so that should be an improvement over the ridiculously small levels of both predecessors.
Skepticism because, well, everything else. All these story elements were already present in Dragon Age: Origins, but the main story was instead the generic "save the world from evil". And I'm afraid Dragon Age 3 might end up just the same. Maybe some new arch demon forces templars and mages to work together and... blablabla, same old. I know many love Dragon Age: Origins, but I just found the story and the world to be very derivative, bland, boring. Okay, the story changed in Dragon Age 2, but that story is a mess for other reasons. Almost the whole game I felt like I was doing nothing but secondary quests, just running errands for anyone with a problem. And excepting me to care for the death of a character (your sibling) that I know for just 15 minutes or so, that just doesn't work.
Both Dragon Age games were visually unappealing to me. Dragon Age: Origins was entirely devoid of style in my eyes, and DA2 was better, but with recycling the same environment to infinity there's only so much effect you can achieve.
The combat system was nothing particularly creative, but serviceable in DA:O, I guess. But it was sooo incredibly repetitive in DA2, every single fight played out exactly the same way, even many boss fights. Not to mention the parachuting enemies. And the AI was horrible in both cases.
The characters were such a mixed bag as well, in both games. Not bad, sure, but today, I expect more. And BioWare did better in Mass Effect. Many were just too one-sided, and sometimes over the top too, like Merill and Isabella. I get it, Isabella is sexually liberated, that's great, but does the game have to comment on that every damn minute?
In short, I want to be hopeful for DA3, not the least because good western RPGs are rare, but DA1 and DA2 are so full of design decisions that I think were bad or lazy that I am very skeptical. And if I have to save this damned world from evil again... I don't want to return to DA:O.