Being that I have an incurable case of altitis, I'll be playing an agent (purely for the spiffy ship), the trooper and the bounty hunter.
It rather bothers me that you are assigned a ship and a side based on your class. I would rather like to be a bounty hunter that works for whomever pays the most, republic or sith. I wouldn't mind playing a rank and file trooper in the sith empire's army, and it would be nifty to consider that the empire also has the equivalent of agents. I also rather think that, as a smuggler, one would be outside of both sides. Instead we have smugglers who... what, smuggle for the republic? (Unlike the little video they released of the smuggler being held by the jedi for suspicion of smuggling.) It boggles me that we don't have a group of aligned classes that allow you to choose a side and then the non-aligned classes (bounty hunter and smuggler) that operate outside of the conflict (outside, yet affected by).