I want to roll a stealth alt but I'm having trouble picking one. How does everyone enjoy their classes based on style? Damage output doesn't matter to me. Opinions on factions/storylines?

I have a 50 Operative and a 50 Assassin. Game play wise, I much prefer the Assassin, especially in PvP, but then I really enjoy tanking.

 

However, the Inquisitor storyline is pretty bad, especially as compared to the Imperial Agent.

Ihave an Assassin and an Operative, both at lvl 30, and enjoy both classes. I prefer the Assassin for pvp as well. Pve wise, either one is funner and easier to lvl than a Sith Warrior, which is not as bursty dps wise(at least at lvl 30). And I also agree with the poster above me about the class story...the Op's is more interesting and involved than the Assasin's. Although I wouldn't say it was "bad" or poorly done.

I only have one stealth toon - a jedi shadow - infilitrator spec. I have other alts, but the Infil is my main toon. I enjoy it a lot in FPs, and levelling, never done pvp on her though. I like the double bladed saber although it can feel a bit clunky at times, but dont pick the jedi if youre not into the 'obi-wan' style diplomacy/martial arts class quest (so far I havent finished part 3 so I dont know if that changes).

Still trying to figure out what stealthers do to be able to plant bombs in voidstar with out leaving stealth.

Although I wouldn't say it was "bad" or poorly done.

 

Just wait until you get to Act 2 and Act 3. It's pretty much all downhill after the Prologue.