No dalaran hearthstone?
Boralus, usually it’s in the Old Town in Stormwind, if we get a unique hearthstone ie Legion and WoD, but this expansion it’s center of everything needed.
main hub, across the board
except for a couple of alts that i don’t really play but want in on the big chunk exp have theirs set to IF for easier return from greench quest
Arathi Highlands because I used to do a lot of RP in gilneas and that area and as a mage I never bothered to change it since.
Snug Harbor Inn or the Great Seal. Though my Hunter used to have it on Vulpera Hideaway until I finished up Exalted with Voldunai.
Snug Harbor Inn/The Great Seal for my characters in BfA areas. Otherwise, I set it to Orgimmar/Stormwind for my other characters.
Mine is set to Boralus
Wyrmrest Temple, used to be set to Darnassus but ya know…So I have it set to a frozen wasteland until I find an equally nature filled place.
The inside of a marble?
hearth is set to Salty Sailor Tavern. +1 to someone who knows location without searching.
Zandalar. It’s a decent spot to get to almost anywhere in the game with it’s access to org 
working on draenor atm, never got flying to working my way through the quest part atm