Although most specs fit their class from a Lore/Theme standpoint, there are typically one that fits best for most people (And a few that don’t really fit at all lol).
Does your list look the same?
Warrior - Fury. I just envision a Orc going crazy and raging with those red eyes and huge swords/axes. For the Horde!
Mage - Arcane. Pretty easy one. Actually, the easiest one for me.
Hunter - Marksmanship. Another easy one. I’m sure some would say BM, but to me, Hunter/Ranger lore is essentially and elf with a bow who is a sniper.
Rogue - Subtlety. Sneaky. In the shadows. Under a hood. Assassination does work well and is a close 2nd here.
Death Knight - Frost. Closer for me than I thought initially with Unholy, but ultimately the cold of Death and Arthas are just too much here.
Warlock - Affliction. Another really close one. You could easily argue either spec actually (Especially Fel Fire Destro). Ultimately, the idea of DoTs + Siphoning Health which Affliction was built on take the cake.
Druid - Feral. The hard ones continue. Although this is really a battle between Feral and guardian for me. Balance is my favorite spec but it’s not the best lore spec. I settled on Feral since it feels the most dynamic but this is probably the one I have the least conviction in.
Paladin - Protection. The ultimate Holy defender. Yea, I guess the other specs have some possibility but this one never felt close. Give me a shield and holy power and stick me in melee to protect my allies. For the Alliance!
Shaman - Elemental. Always a big lore debate in the Shaman community but I’m on team I wish they focused each spec on 1-2 elements instead of the balance. It hurts the flavor of Ele v Enh. They are too similar imo. At least Resto is focused on Water. But I’ll give the nod to Elemental on the name of the spec alone lol
Demon Hunter - Vengeance. Still the least developed class Lore/Theme wise to me. And the one I have the least emotional connection to. But Vengeance fits the most from how we were introduced to this Class (Illidan).
Evoker - Devastation. This was actually a tougher one than I imagined. Despite the headache Aug has caused gameplay wise, all 3 specs fit a theme/lore of dragons that we have had in the game going way back. But ultimately, when I think Dragon, I think fire/destruction/power so this is where we land.
Priest - Holy. When I think Priest, I think Holy Church. Somewhat simple and straightforward. I rather enjoy the flavor of Disc/Shadow, but at the end of the day, this is one of the more obvious ones for me.
Monk - Despite the fact that I LOVE the fun lore flavor of Brewmaster and Mistweaver (Even moreso if you play Panda), this is Windwalker and it’s not particularly close. It’s so clearly a martial arts focused spec and the animations are some of my favorite in all of melee land.
P.S. If you decide to factor Race into this, things will change as I actually think Race is the most critical fit for Spec. I’ll use Shaman since it’s my main. Want to play Orc or Dwarf? Enhance. Tauren or Kul Tiran? Restoration. Troll or Draenei? Elemental.