Some excellent replies here. Christaphonz, don't worry! I want you to talk

I agree with many of the points made here. I was originally planning to go Tailoring and Enchanting which are of course the easiest ones for those of us dungeon farming. After reading the replies, I am thinking it might be best to bet on ignoring all of the other professions initially. I fear there's a lot more potential for time wasted with trying to keep them up to date, than there would be with ignoring and addressing them later.

There is even the possibility that the gold gained by ignoring professions (advancing, leveling, and farming faster) could actually be so much better that it allows you to buy the materials to level up some of your professions. Especially at the beginning where those who are picking professions only for extra cash are expecting lower prices.