In the past professions all had special things that you could do to increase your performance. (ie enchanting had enchanter only ring enchants, jewel crafting had mega gems, blacksmithing had extra slots to belt and bracer or something). Improvements that were BoP and only for the person with the profession.
These days they removed all that probably because it forced people to pick professions they didn't like so they could do more damage/healing whatever. So now the personal gains from professions are pretty minimal and it really doesn't matter TOO much what professions you pick.
I'd like to find the little perks of each profession and weigh the costs and amount of time needed to gain these perks.
Personally, I have engineering and inscription at the moment and don't really feel too excited about either one.
Engineering:
--Rocket Boots: Share cooldown with dps pots and don't work in most pvp.
--Goblin Glider: Doesn't work everywhere anymore, works in some BGs, doesnt work in mythic+ dungeons. Plus you could just buy the BOE parachute gliders off the AH and get the same effect.
--Failure Detection Pylon: works on regular mythic dungeons (was useful once during a karazhan nightbane run) but doesnt work on M+ dungeons.
--Auction House in Dalaran: Very cool and convenient, people that have to go to orgrimmar are suckers!
--Jeeves: very cool, personal bank access during raids is awesome and repairs when people can't mount up.
Inscription
--vantus runes/glyphs: I can make these and sell them on the AH, big whoop
From what I've heard from friends in game is that Alchemy and Enchanting are the best professions in Legion. Reasoning behind these 2 choices are:
Alchemy
--2 hour flask: flasks are too expensive, and were using them outside of raids (in mythic+ dungeons). 2 hour flasks are amazing.
Enchanting
--disenchanting: running m+ dungeons over and over, world quests giving loads of crappy gear, getting bags full of epics, being able to disenchant is HUGE!
I feel like with most professions their main thing is the fact that you can make stuff and sell it on the AH. I am not interested in this. I am looking for more personal gains that make my wow playing more convenient and cheap without having to spend a lot of time on them.
DISCLAIMER: This post is based on my personal preferences based off my playing style. My playing style consists of Mythic+ dungeon farming, World quests, some casual raiding, and doing battlegrounds/arenas occasionally.
I am curious as to what others find as the best professions in Legion and their reasoning. Thank you