Breakfast Topic: Professions and Leveling

The debate over whether Death Knights should get a free hand up on their primary professions continues to rage, but what actually interests me most are some of the arguments put forth by those opposed to Death Knights getting "free" tradeskills. Some of them are saying that it doesn't matter that Death Knights have to wait, because people should wait until max level to deal with professions anyway.

This is a completely alien concept to me. On any new character, the first thing I do upon hitting level 6 is run to the nearest profession trainers to learn my chosen professions. I like being able to doing something about those herbs and mineral nodes I see while I'm leveling. I can go do some tradeskilling if I start getting bored of leveling, and I can use the final product for my own leveling process, or sell the raw materials on the AH for a nice chunk of change.

I can't really fathom waiting for maximum level before I started a profession in earnest. Why go back to Elwynn forest to harvest bushels of Peacebloom at level 70 when you could have done it from level 1-11 while you were there?

So here's something that may be considered somewhat of a companion question to yesterday's profession question: Do you level your professions while you level up, or do you leave them until after you've leveled up?