I'd like to bring back the Chocobo Breeding, and have my own personal bird that has lots of distinct looks, as they did in XI. However... While I think the mounts should be kept to our beloved birds, I'm all for pets.

Actually, I was kind of hoping my Pathway Partner would serve more along like the Adventuring Fellow in XI. Having the ability to have your own permanent pet though... That would have been fun. I had always though Pankration would have caught on more had they allowed you to actually call your beast. I'd like to something that lets you call and customize, heck, maybe even trade pets. Like, say you're out fighting Gnats one day, and the Gnat drops a Gnat egg. You could take it to a beast stable, and then the stable master would take it, hatch it for you, and then you could name and raise your gnat, and have it learn specific spells. And to call it you use your Beast Whistle. Meanwhile, you could maybe even have a Beast Master like class that actually boosted the pet's abilities (as that would be their main weapon.)

There's lots of cool things you can do with pets.