Blacksmithing....so I can make my own uber weapons.

Cloth maker......to make my own armor, hehe

It depends.

Blacksmithing produces both armour and weapons, but not much use to a sorceror.
Clothing Produces light and medium Armour, but not much use if your character wears Heavy.
Woodcrafting produces Bows, Staffs, and Shields, but you still need armour/clothing.
~So you need at least one of these, probably two, but not three.

Provisioning produces good health/magic/stamina buffs.
Alchemy is a bit of a joke atm, but does produce some useful products.
Enchanting is useful, but a pain to get all three rune types in sufficient diversity to be really great.
~You probably want one of these too.

But which ones you choose depends on how you play.

All are good. So there is an issue with inventory management, trying to get all of them up. My wife and I split the 6 down the middle, she does provisioning, alchemy and enchanting, I do woodworking, blacksmithing and tailoring. It works out pretty well.
If you had to just pick one though, I would say go with your armor. It's very helpful to get new armors every other level, and it's easier to buy/scrounge everything else from your guilds.

Jewelry