Hello all, I know there is an Armorsmithing Vs. Weaponsmithing thread stickied, but this is different. I am a Master Swordsmith, working to get my Blazeguard.
Now, I think that armorsmithing is not too useful, and I have my reasoning.
It is this: As an armorsmith, your special item is the Bulwark of Ancients. Now this is a chest piece, so if at any point you start to raid, this piece will be replaced by a chestpiece from a set, so that you can get the set bonuses. I know not everyone raids, and fro some people the Bulwark of the Ancients is one of the best chest pieces you will ever see. However, there are also smaller sets from 5 man Heroics.
I think weaponsmithing is a much more viable profession because you will pretty much always be using your special weapon, unless you find a better one, which is inlikely unless you start to raid Black Temple or whatever. The Blazeguard is the best tanking weapon avaiable to me now, and it will not be replaced by a tier 4 piece or whatever to get the set bonuses.