The guide mentions the blood elves at level 50-ish in azshara, I found their casters pretty tricky as a class with few interrupts it was difficult to stop their heals. Also very popular place to grind.

I much preferred the beach, it's full of Naga that are a breeze to kill and can easily accomodate half a dozen people grinding there so less competition. It's my go-to and I stay there for a few levels.

That little scourge area up the hill just north of Light's Hope Chapel in EPL

Felwood satyrs always provide a decent amount gold, demonic runes and (fel)cloth.

For professions when I was Herb/Alch, I would farm dream foil in Azshara and Winterspring!
I would love running around and gathering as much as I can!

Also enjoyed farming Living Essence off the Tar Creepers in Un'Goro and the Fire Guys in the middle of Un'Goro, forgot what they dropped that sold for alot...