I just looked at my triples.
They break down into categories:
Back in the glory days when I was farming Pandaria and the Tournament, and bandages were rare, there were several utility pets that I doubled or tripled so that I would always have one available without healing. I remember was so pleased with myself when I could get all the way around Pandaria without needing to visit a Stable Master. Anubisath Idol
, Pandaren Water Spirit
, Blighted Squirrel
belong in this category.
Bandages are everywhere now; all of my characters are swimming in them, but I do still have the habit of "keeping a spare" of much used pets.
I specifically want multiple breeds of some pets, like Qiraji Guardling
, Blackfuse Bombling
, Gilnean Raven
, Nether Faerie Dragon
Sometimes I never quite made up my mind which breed I wanted, and just kept the extra ones even though I don't use the pet much. Albino Chimaeraling
is my prime example, since it's near the top of my list alphabetically.
3. Team of 2 or 3
Sometimes I want a raw power team to blow away a battle quickly without having to think. I'm using these teams a lot at the moment for Legion World Quests. Some were handy in the Garrison as well. Throw one of those teams where you have a type advantage, and it's all over. They were also especially handy for Family Familiar, of course.
I think this is what you were asking about - actual teams of 3.Nexus WhelplingBone SerpentIron Starlette Zandalari Anklerender
are the triples that save me time and attention regularly. Like Dirty Harry, you don't assign them to a case - you just turn them loose.
4. Just haven't had to cull.
I have a P/P and a H/H Emperor Crab, and I want them both. I also have a third - another P/P. I don't ever expect to use two P/Ps in the same team, but I hate releasing a Blue 25 Emperor Crab.
Some pets are tradeable, and I might sell them someday, or I used to sell them, but the market hasn't been good, or I am raising them to sell. I used to make good gold from trading pets, but not so much anymore. However, I am definitely left with "stock", from interesting, like Hatespark, to garbage, like Voidcallers and Weebs.