Trooper Commando DPS here, may give the healing a go at some point too depending on the respec situation.
ok since I have been a bit anal in this regard I may as well post mine. Final specs obviously will be decided later, these are for levelling mainly, and some are undecided.
sith warrior - juggernaut - dps spec
Imperial Agent - stealth dps / healer undecided
Inquisitor - tank
Bounty hunter - rockets baby!
trooper - tank
smuggler - ranged, probably going with explosives
consular - healer - going to try to level as healer if my companion can handle it
Jedi - dual wield, burst dps, probably changing to dot build later
Either Jedi Knight Sentinel Watchman or Jedi Consular Shadow Kinetic Combat.
Commando Trooper, having a Gatling gun is too hard to pass up.