Personally I love the look of leathers and roll roguish alts. But I typically play healer/support so I must wear cloth.
The heaviest armor they allow for a Cleric! Heal, Heal, smash, heal, oh s**t heal, smash.....
Heavy jet black full plate with a helm with 2 curved horns and a big big morningstar and my cleric will smile (if you could se under all the armor)
Plate healer.