Hmm, I have to disagree. You may have found it “not much fun,” and “painful,” but that’s definitely not a universal experience. Fun is subjective, and you paint a pretty dim picture of the leveling process. Not too encouraging.
OP, I’d take what that person said with a grain of salt, and remember it’s just an opinion. To contrast, I had great fun leveling my Shadow Priest. Never had a problem killing anything solo, and I always brought solid DPS and utility to a group.
Professions don’t work like that anymore. In the past, they did provide specific benefits, e.g., your strength would increase as you mined minerals, and since strength is good for certain classes and specs, those classes and specs would want mining for the +Strength.
Nowadays, they don’t do that, though. So, in the case of Alchemy, you have a profession that makes potions and flasks, among other things. The potions may be something like a health pot (restores health, good for every class and spec), or an elixir that increases your intellect/strength/agility for a small period of time, or some other stat such as haste, critical strike, versatility, etc.
You can:
- Make your own health and mana pots.
- Craft trinkets that give a 40% increase to the efficacy of the pots I just mentioned.
- Make your own intellect flasks (+DPS / +Heals), potions, etc.
It’s personal preference - your best bet is to read up on both profesions (well, actually, all professions), and then choose one. If you do Tailoring and Enchanting, you’ll still benefit. There really isn’t a profession that you cannot benefit from.
With T&E:
- You can make your own bags, lots of different gear, and via disenchanting most of that gear, you’ll provide yourself with the mats to level enchanting.
- You can enchant your own gear (+Int, +Str, +Just about any stat.)
- Enchants sell for good money, but that’s an end goal. Early enchants sell for very little, if at all.