As I'm actually watching this expansion, and may or may not come back depending on if I like what I see (which is better than the "never" it used to be), I figure I'll reply. ^.^
Tetsusaiga - Echeyakee
I've had him since vanilla when I was a wee hunter, some eight or nine years ago. I did foolishly release him once, but petitioned a GM to get him back, and have vowed that he will never leave my side again. Everrrr. He's my bestest best bud.
Apollyon - King Krush
I bonded with Apollyon during the time that I didn't have Tetsusaiga. He very quickly became my second bestest best bud. I can't go anywhere without him, either.
Naphthali - Razzashi Broodwidow
When I played, sadly I didn't use her as much as I'd have liked. But now they have the thing where you can pick your pet's spec and all that, so chances are very good that she'd go back into a regular pet rotation. Regardless of use, she's still one of my cherished pets.
Shikon - Gondria
She has always been, and probably always will be, my favorite spirit beast. I've had her, released her, had her again, etc., but yet she still manages to worm her way back in. I think she's trying to tell me something.
Vulkoor - Madexx
Back before they had these colors on common mobs, I was desperately trying to get green. I got black. And despite my attempts to hate this black Madexx for not being green, he grew on me. Dang it.

He's my tank now, managing to beat out even the mighty Sheldon.
Welp, that leaves me no room to tame anything else in Draenor. Oh well, I've already got my best friends with me.
