Back in 2004 I rolled a UD Rogue and any character I’ve played since then has been Horde - with one exception: I did roll a welfare paladin in BfA but I don’t count that because that’s an abomination.
This time I rolled a paladin again but got bored by level 15 so I re-rolled as a warrior and I’ve been much happier and now nearly L40.
My original wow experience was Horde, and like you for alliance, that’s “home” for me. But I deliberately wanted to see the game world from the aspect of an alliance character circa the time I was grinding away as Horde. And I’ve been in awe of all of it. Even as an alliance character, it’s super nostalgic for me walking through hillsbrad or traveling to SM (I never appreciated just how much of a trek that was for alliance).