Of the professions I've leveled, I'd go with jewelcrafting. However, I'd bet that blacksmithing would be the worst.
I think it depends on what your profession combo is.
My main was an engineer/enchanter and I hated alts so I had no gatherers until late Wrath. It was expensive and time consuming to level that combo.
1. BS and 2. Eng are the hardest. Like someone already said, "Need to use the mat to make a mat" but then you still need the original mat........blah!
3. LW thru 300 is annoying, then the mats (on my server get expensive)but the process is easier
4. tailoring and 5. enchanting (usually go together and they are Gold sinks)
6. Alchemy and Inscription are almost as easy as gathering professions.
7. Skinning (what? I have to kill and now with Group Loot...someone might steal my Skin!) <no xp gain= grrrr> where is group skinning?!
8. Mining and Herbing = xp gain
Archeology is MUCH easier then it used to be, pays pretty well and offer great XP and sometimes cool stuff) but it's also a little time consuming and frustrating when it sends you away from where you want to dig.
Cooking (darn it, I forgot to level it during Thanksgiving week) can be expensive or time sinks..
First aid = farm the mats or pay the price but right now most of my cloth is going to my Monk's Tailoring
I'm not a "pro" raider so most of my toons have the gathering profession to go with the Crafting. However, when I started alts that were repeats I chose more raid conscious crafts like my second hunter is an eng/lW and I have a second priest that is alc/ins and my monk is tailoring/ech. It's expensive to level and a lot of toon hoping happens but even tho they are not at maxed level , I can see they are More raid "ready".
Its individiual. I powerlevelled BS and found ti easy, Enchanting and Engi too, this one was just the most annoyign I have had so far
A tie for me between Engineering, Blacksmithing and Leatherworking.
All are equally horrible from 1-525.
All who believe in telekinesis, raise my hand
None of the professions seem particularly hard to skill up from 525 to 600, or at least that was the case before they nerfed ore node spawn rates.
Enchanting is pretty horrible still. Having to single click each individual skill up on a vellum or on your own gear is absolute crap. I wish I could do multiple at a time.
That said, removing the need for each rod was a really nice step forward.
Aveline's amazing work!
I've leveled quite a few professions so far this expac and I'd say engineering is quite easily the worst. I haven't tried enchanting in a while though, that used to be a pain aswell. That's talking from 1-525 mostly though. I didn't feel like engineering was too bad from 525-600, mostly because of stupidly low prices on ghost iron
From scratch, LW by 10 billion percent. Next to no one skins and it's not something you can farm as quickly as ore/herbalsim if you want to do the farming yourself, which you don't. It would be very expensive overall. Second worst overall would be enchanting, than probably BS/Eng.
As for 525-600, IMO it's BS, I thought eng wasn't that bad as you can make things that actually sell/are useful unlike BS where you just make green crap no one wants that cost 1,000g per 3 levels pretty much all the way through.
BS is a pain but I feel Engineering was much worse. Personally I enjoyed leveling my toons profession. I even offered to level my guildies.. 8)
re: 525+ engineering leveling, agree, with more items crafted that actually sell on the AH (ghost iron trinket + cogwheels & scopes), but i pretty much just mail all my crafted BS greens (actually all my crafted greens and occasional blues) to my enchanter to disenchant. using that strategy is why i havent had to buy enchanting mats since BC level.
I think the worst to level up is any two "production" professions without the respective gathering profession.
But if I had to choose I would say engineering since you need a greater variety of components for better rewards versus something like blacksmithing that has very straight forward recipes.
"Enjoy your power"
Blacksmithing was a real pain to level but my realm has a pretty bad economy so.
From the #1 Cata review on Amazon.com: "Blizzard's greatest misstep was blaming players instead of admitting their mistakes. They've convinced half of the population that the other half are unskilled whiners, causing a permanent rift in the community."Blizzard's blame game in action: Deleting 6,100+ of Kevyne's posts and threads from the WoW forums.
Blacksmithing before MoP....so much money and/or time wasted to get the 100 ore you need to make like 2 things.....
"I just wanted them to hand us our award! But they were just talk!, talk!, talk!......" - Wrathion