I have a 525 blacksmith and a 525 tailor and now I desire to break into leather-working. The bracer lining buffs are great and I have shaman, hunter and rogue still under the level cap that would be fun to cheaply gear up while leveling up the profession.
I think leather-working should be the most profitable because it serves four classes and all the roles (melee DPS, caster DPS, healing, tanking) while the other two professions only serve three classes. Does serving more classes and roles necessarily translate into more favorable profit margins for epic armor crafting?