I have no idea what vision is. The line art is well done and the shading is nice. There are no odd spots. No breaks in the lines or oddities in the shading or coloring. The couple's icons are cute to. Over all id say you did quite well on them. The cat icon you did stands out the most overall considering the other icons are dragons. A few of the dragons do hold a bit of similarity in muzzle shape though. Its some of the blue ones but it seems alright. The hair on some of the dragons is quite well done as well.

A few of my favorites are 3rd, 4th, 5th, The green one on the same row as Gweaks and the ice colored one with the chin spikes. Though the yellow one on the bottom is interesting to. I don't see any thing particularly wrong with the icons so I really can't give any helpful opinions on that but textures is always a plus. One idea is that they could blink like the creepy icons but that might be a bit much.

I hope this helps. Also i just noticed the dog icon. The muzzle could maybe be a little longer and narrower or that's the species. I could be wrong.

this is deff interesting, i love the colors used in each icon, they all seem to suit each char, and the diff styles of each char is deff wicked!
the only thing i would suggest is giving each one somthing on it that u know moves or even an eye winking or somthing u know to give it a lil life, now that just one man's opinion haha and i know it prob takes time in developing these bad boys
other then that these are wild, and very well done, ill have to check your journals to see if u take commish's and prices, cause you've got me interested