Well, to say something about the "dark" in this fantasy game... I don' t know about you, but venturing deep into the Deep Roads and finding the disturbing stuff in there, I can honestly say that this game has earned the dark fantasy title. Sure, you might have seen many demonic fiends in your days, but not always you are given the insight of HOW they were made.
DA:O is a good fantasy game. It doesn't give big huge innovations, it just gives a new spin on some old cliches, while also offering quests with often (and sometimes quite complicated) moral decisions. At this point of time, there is little that hasn't been done before. If you think there is, go to Tvtropes and prove yourself wrong. Is that a bad thing? Good heavens no. If given a choice, I rather take something that has changed only slightly, but is still recognizable and familiar, rather than something, which requires LSD to figure out. I don't want this "innvation" that everyone and their mother tries to achieve these days. I just want good, solid games. And Dragon Age, of course, with it's flaws, is just that - a good, solid game. Great characters, good dialogue, solid squad based gameplay. In short, a Bioware game.
If you don't wonder if this game is worth your money, ask yourself - when was the last time you had 60 hours of the first playthrough for $50? I can't remember. Yes, my first playthrough took 60 hours. That's one character, one origin, and mostly the plot with few sidequests. This game is worth playing, and it is great to see Yahtzee, someone who isn't that extremely into RPGs to get sucked in while playing.