While obviously one can alter the character portraits oneself in the game, it might make some nice downloadable content if a few new portraits were done to add/replace the ones given. For one thing, there isn't a blonde woman in the set (how did that slip by?).
Ideally, there should be 40 portraits minimum: 4 of each gender/hair color (black, blond, brown, red) and 8 for darker-skinned chars (4 male, 4 female). Might be something for the artists to do in their spare time.
-- Mal