Originally Posted by
goblingirl
LW is best suited to an alt. For mains I strongly suggest playing professions that have a length-of-expansion sales opportunity - i.e. anything that crafts consumables: alchemy, jewelcrafting, inscription, enchanting.
Blizzard never does a good job of updating professions as an expansion goes on, so the armor crafting ones (and to some degree weapons crafting as well, although it doesn't suffer quite as badly as armor) always suck by the x.2 patch of any expansion. Rarely, we'll get something cool like the late-expansion crafted epic belts and pants they added to LW in MoP, but that's definitely not been commonly done.
Anyway, if you want to make steady gold, best choose something that people will burn through and buy again and again.