OK so i started playing a Jedi Knight, and for a change of pace from DPS i choose to go guardian. But i'm not satisfied with it. Apart from feeling completely inadequate in WZ's i don't feel as though i'm making any contribution even in Flash Points since there seem to be better tanking classes, such as the Vanguard.
In other peoples opinion, is it a waste to play as a Guardian, should i have chosen a sentinel or shadow?