Me personally, I like animal hybrids, deer, original species, and large cats .
I tend to like adoptables where the designs are well put-together and you can tell the artist actually gave it some thought opposed to rainbow animals and glittery things .

I personally would like to see more felines both domestic and feral, dragons of all forms (especially Chinese ones), original species, and just weird exotic animals people hardly/never use, such as bears, zebras, giraffes, pigs, rodents, deer, etc. Though, I love canines the best and I think just about everyone does too, so I'd also like to see more breeds like pitbulls, boxers, pugs, weimaraners, hyenas, hellhounds, etc. rather than plain wolves. Just... I don't think hyenas are fully canines. xD

Edit: Didn't see any replies when I was on the page typing, but now that I replied, I just want to say that I fully agree with Moro with how people actually take time in things and not just quickly coloring them like all sparkly and rainbow-ish.

Edit 2: I also agree with Klaus about colors, I too both love seeing natural colors and bright colors as long as they go together and the artist takes time to make them look good.

I personally love the dog/wolf adoptables.
As Jess stated, it would be nice seeing some different breeds - French Bulldogs, Beagles, Dobermans, Bull Terriers, Goldens, etc.

However, I would LOVE to see some Lion/Tiger/Snow Leopard or any other big cat adoptables!

Hybrids and original creatures are also eye-catching too!

I like both natural looking and colorful creatures. As long as the colors blend well together and it looks as if the artist took the time to make it look good.

In my perspective, yes, those critters would work for the unique aspect.
I want one already, those things are just sooo ADORABLE. Gimme gimme gimme. OuO

@Jess Bears, zebras, giraffes, rodents, etc. sound lovely . They're underused and under rated . To be honest Ive seen -maybe- one or two rat characters and that's about it as far as rodent characters go . I've never even heard of a capybara being used as a character to be honest . I'd love to see sun bears as well . They're derpy and cute and honestly rather odd . I'd also love to see maned wolves opposed to just.... normal wolves .
Hyenas actually aren't canines at all .

That purple character there is adorable . >>

I adore that Purple character! The green guy above is cute too.
I would be interested to see/know more about them and all their possibilities.
But YES both of those could easily be adoptables!

I really like the Reptilian snouts and tails ^-^ I would totally scoop a few up if you decide to officially release them.
They would be badass if they were to eventually be customizable!

As for naming, I have seen people post naming contests for them (most have the winner receive a free one of the species....or another cool prize).