Gotta admit DRK is probably the most unique of all the tanks considering it brings Magical Damage / Magical Mitigation to the game. GNB is proabably the most unique when it comes to DPS combo if you pull it off right. But to be honest I would not be surprise if all tanks felt the same like how all healers same. I miss when Astro Identity was Duality. It was cool either shifting from Heal Stance to SHield stance. It been cooler if you could've switch on the fly to spice up gameplay. 2