I don't see a need to make massive amounts of gold in classic. What are you going to spend it on? I was picking my professions based on the BoP crafted gear I want for them. Warrior a blacksmith, mages a tailor, etc, then engineering for various other combat enhancements.

But, until the server economy stabilizes, herbs and ore are going to be outrageously priced on the AH, just like the release of every expansion. Thats where the gold making will be for the first several months.