I have a rogue, priest, and hunter so far, and the only thing keeping me from a shaman is the lack of a good name. And then I came up with a good Vulpera warlock name last night. I had no intention of making a Vulpera warlock but now I might? Oh, and I’m thinking of race changing my other monk and my mage to Vulpera.
How can I stop this? I haven’t even touched the new N’zoth stuff yet! I guess the 50 cap will eventually end this madness.
You stop if your account runs out of space.
I’ve discovered that they keep the 50 cap limit in place your our own safety and sanity. 
Honestly? You don’t.
“Fur the Horde!”
How do you start…
I only make 1 of each class, per faction.
E.g. I never understood why you would want 2 Death Knights on the same faction
Usually you’ll want a Human Unholy DK to cosplay as Arthas, a Blood Elf Blood DK to play a San’layn vampire and a Dwarf Frost DK to transmog beer mugs in both hands and give them the Winter’s Grasp enchant and kill people with cold beer.
Rapidly approaching that dilemma.
This. I made one to unlock the heritage armor at some point. I made a mage, for ease of leveling.
But the more I think about the lack of lore for Vulpera and the abundance of Sethrak lore, the less I want to play one.
Well when a male vulpera and a female vulpera develop feelings for each other…
There´s no stopping us. I already have one of each class.
Windfurry…
I have the same problem, OP. So far I have this rogue, shaman, hunter, monk, and warrior. The warrior is just a name reserve for the Vulpera DK I will create when I get Shadowlands. It’s so bad, I’m even casually flirting with the idea of a Mage. Mage is my least favorite class, but I think a Vulpera Fire Mage would be a perfect fit. Also, I’d like to have a Vulpera clothie for mogs 
It is threads like these that prove why the 50 cap is needed. Otherwise Blizz’s servers would explode from an infinite amount of data because of an infinite amount of alts.
Easy. I look at my dog which happens to look like a fox, and then realize I gots one of those, don’t need one in WoW.
You could make one and name it after your dog.
Stealing the dwarf DK idea what with the killing people with cold beer.
We need someone to step up and fight the fox menace like the great panda hunter of yore.
How have I never thought of this
By not making one at all.