Its really great that you guys are paying attention to what the fans would really like to see. Bravo.
I think RobbJKJ's questions were outstanding. In that spirit, I'd like to add an additional question. Namely:
How much will you take into account the physical build descriptions given in the novels for the various characters? A really "pretty" Jaime that weighs 150lbs, isn't going to be quite as convincing as a master of the two handed broad sword it seems.