I'm not especially bothered about which class or faction. Is there any general consensus as to which has the best stories? I know Agent is generally said to be the best and the consular story is said to be pretty poor, but what about the others? I've only completed the inquisitor story for myself so I can't really say.
If I had to choose a preference though, I think for Imperial I'd go for either an Operative/healer or a Warrior/tank. For Republic I'm thinking either a Knight Sentinel/DPS or a Gunslinger/DPS.