Shadow tank

[Riiker]

Thanks guys! I have a lvl 29 shadow that I'm thinking of pairing up with a sentinel that I have on the same server and using the shadow as a tank. I'll probably 2 box them to 50.

[Mooni]

My first 50 is a shadow tank.
"Again, with the rocks!"
This is the one I do real tanky stuff on when I'm not 2boxing dailies; I remember the first time I joined a flashpoint with someone else and they said "Shadows are more like WoW rogues; they have light armor and stealth and backstab. They're not tanks; Guardians are tanks".
That person was mistaken, and has thankfully stopped playing SWTOR. We're not rogues; we're feral rogues.
Now, as a tank, I'm rockin' close to 25000 HPs and sometimes beat 2-3 DPS on the meters. I love the toolkit we have; we have sap-style CC, another 6-second CC, a 4-second single-target stun, a 2-second knockdown, and an AoE knockback. We can death grip. We also have the ability to self-heal, which other tanks lack (Guardians can do it a little now, but not as often as we can). Sometimes you can fire off that Project-Slow Time-(Single strike or double strike)-Project-Telekinetic Throw combo so fast you're healing yourself for 12% of your health every 6 seconds.
Plus, 3 defensive cooldowns: "Resilience", The one that makes you immune to force/tech, "Deflection", the one that increases ranged/melee defense by 50% (buffing my defense to over 70%), and "Battle Readiness" which increases how often your other heal proc goes off (+425 health). Add relics and adrenals and you can constantly have some kind of extra defense buff up.
Since you've hit 29, you've got Holiday CCing for you now. That's just awesome.

Pic related: It's my shadow in her hot new (and only slightly bugged) robe.