Agreed, I played a dreadknight in Vanguard, and it would literally make me want to go to bed after some hours inside a hardcore dungeon.
Although I don't know where I fit into the whole equation, Ive played tanks and supports, but now in FF14 Im a dragoon, I agree that for one I have never and will never play a warrior(boring sounding) , I have played a pally but Im just kind of sick of em. If there were more tanking classes I may roll one IDK.