30-40

BFD is definately worth running, I loved it, got my Staff of the Sleepwalker and Gravestone Sceptor there that I'm still using at level 32, Gravestone Sceptor is getting replaced with Earthen Wand at level 33 and Staff of the Sleepwalker is getting replaced with Illusionary Rod.

for 30-36 i grind in shimmering flats, for horde. Not as much gankage as in STV, and not really many people there in general. at 36 or so just run SM as everyone has previously stated, it works like a charm. But ofcourse if your not on a pvp server go to STV at 30 if you like, you can do a few quests

I'd actually suggest waiting until about 31-32 to go to STV because the quests will be a lot easier if you do. Just do Shimmering Flats first, the quests there end up leading to STV.

In fact, do your best to avoid stv. I hate that place.

Well at level 30 I could only find 2 quests that were yellow for me in STV except for one green quest in BB, at level 31-32 that changes and there are tons of quests that are yellow, and there are 3 quests where you have to collect things from the same mobs, the trolls, so basically you do 3 quests at once which is very efficient, and they are just north of Grom'Gol, so even if an alliance attempts to gank you you can run away if you can't handle them, I guess it depends partly on what class you are since as a mage I can run away from just about anything. The only thing that killed me in STV was a 60 rogue that ambush critted me for 1500 damage or so, and I barely have 1000 hp.

What about Desolace? I have a few quests there. I did Shimmering Flats and a bit of STV. (major gankage, must've picked a bad night) One more level and I plan on running SM for awhile. I'm 35 now.

I'm 35 right now doing desolace, good level to start it.