Well I don't really care for either jedis or sith so it's was basicly between Bounty Hunter and Smuggler and BH wins that by a longshot. Sure, trooper and agent works but they're still a bit to tied to empire/republic for my taste and after playing both BH and trooper the BH just plays better, more fluid and responsive while the trooper just feels sluggish and suffering from bad ability delays.
But I would have really prefered a neutral faction where I could play a BH and doing missions for cartels and huts instead of the empire. Would've been a blessing for PvP aswell of course.