I use all of them at random, they all immediately went into my favourite mounts.
My only complaint is if I’m doing the sheepherding centaur daily on my protodrake I should definitely have an option to just grab the sheep and fly it back to the shepherd. I look so silly chasing a 100kg sheep on a 10,000+kg dragon and the sheep just ambling a little bit away at a time, lol. They must breed them tough!
I like the green boi. Hes the smallest and you can see where your going.
I like the red one.
Proto drakes have big heads and tiny arms, it’s adorable.
The highland drake looks the best. Wylderdrake is dope too.
The pterodactyl doesnt look great and proto drakes are just awful.
I ride the red one so he doesn’t feel insecure or self-conscious.
He’s a very good boy!
I really love the velocidrake since it’s similar to the zandalari pterrodax mounts I’ve been using for years but with draconic features.
I hate giant mounts. For people like me that like smaller mounts, the wyvern is the best
I mean personally I like the #3 you gave there…
I prefer the Wylderdrake tint green one fits my Dark Iron dwarf better. Just need to unlock a better color way
Definitely going to be riding Protodrake on my War.
I still only have the proto-drake. I take it real slow.
I like the design the best, but the color looks super fake.
If you like the blue work on your Tuskar rep https://www.wowhead.com/guide/reputation/iskaara-tuskarr-renown-rewards
It’s too big, I use the small one even though he’s so ugly. 
I’m sure it will change as people unlock more customizations.
I really need to look up how to get a different drake.
Each questing zone gives you one towards the end of its main questline
As a Draenei, I look silly on anything other than a giant mount.
I want the yellow one and annnoyed it wasn’t an option to choose your starter