Oh, if anyone's interested, I just checked to see what my first play through of DA:O was. Have a guess? 200 hours! I'm amazed at myself! But, although I really enjoyed myself, and really really got enveloped in the game, by the end of it, I'd pretty much done everything. I was playing on hardcore, which was a nice challenge. Well, that's my experience.
After the first run, I spend time going through all the other origin stories (up to Ostagar). And, then, Mass Effect 2 came out, so I've been playing that almost exclusively. I'm not sure what my first run through of that was, but it probably doesn't matter.
What I think is most important is the story. If I get enveloped in the events and feel for the characters (which was really effective in DA:O), then it should be well worth the money. Even though most of the companions won't be back, and there will be TWO dwarfs playing major roles, and stuff... Well, I'm looking forward to this expansion immensely. It's been a long time since I've touched DA. I kind of forget how to even play, but I imagine it will all come back to me quickly. I am contemplating starting a new game of Dragon Age, now that ME2 is starting to loose it's shine, so I guess I'll do that while I wait for Awakenings.
Really... 200 hours pretty much exactly. That's what the save says at the end, just when I'm about to go through the final door.