I'm actually with Warty on DA:O being bad. It got lots of attention for good graphics and (snort) adult content, but the story was trite, and the cast of supporting characters falls squarely into Bioware's predictable tropes
. All that may have been reasonable to deal with had the game not been mechanically a poorly designed shambles. The magic system was insanely broken, to the point where it trivialized the entire game. The AI's default behaviour (for your party) was abysmal, and the scripting system they used to allow you to manage your party's behaviour was arcane, took away from your companion's other utility, and still wound up producing awful results.