Wouldn't it be nice(and better reflect a character's role in the party) if instead of the default class icon, if a character has a prestige class, it displays a special icon unique to that prestige class? For example:
Bard level 2: Bard icon
Bard2/Ftr2: Choice between Bard or Fighter icon
Bard level 6/Ftr2, just took Spellsinger: Choice between Bard, Fighter, or Spellsinger icon
Etc.