I didn't really like any of them except maybe Alistair a little bit (but i hear if you are a girl he is a complete pansy when it comes to relationships) and Sten. As far as the story goes... i cant think of a more generic plot for an RPG.
Long ago, something bad people do something bad, unleashing an apocalyptic evil across the nation. you must defeat this evil, that has hordes of evil enemy at its command, and bring together all the races of people to help you (even though they really don't help at all and you can fight everyone in the game by yourself) and the good and evil status was really lacking... i mean... talk about all roads leading to Rome, there were simply no negative actions! if you killed the entire elvish tribe you get werewolves, if you exterminate the mages you get Templar... I felt like it really didn't matter what i did, i was going to walk a strait path to the end.
Its not the worst game in the world, but i would pick KOTOR over it, any day... or if i wanted a good game i would just pick up mass effect... sure it uses guns instead of swords, but at least it makes sense and i dont have to look at my guys drenched in blood after every friggen scratch.