The Fade is the worst. That's all I can really say.
I never actually used Sten or Zevran much but I really loved Morrigan, Alistair and Leliana (in that order) some of my favourite characters in anything. Maybe not Leliana as much, but I still liked her. Dog definitely comes next and Wynne was just boring.
--
http://soundcloud.com/thundersheep/pandora
http://soundcloud.com/thundersheep/the-first-year