Yeah I know aggro doesn't matter in PvP. In pvp the guard stays on healers, especially in huttball. It takes a group of DPS to take me and a healer down while running the ball.
As a BH tank, I don't have a knock-back ability available. I have a charge and the almighty Grapple though, and I abuse em in PvP when I can. PvE I've noticed I don't want the mobs away from me, my best aggro moves and aoes are all short range.
As for the "Duck" (TM)-ing and moving, I try, but I still don't have the hang of the mouse look. I started a new character and mapped a bunch of keys to try and force myself to learn not to "key-turn" but it ain't workin so well so far.