I think you need faster animation loops. Here's a small edit. I also think you need to reshade some of these and I'm sure you can do it.
I made an edit but I can't upload it to imgur. Dang...
edit: Here we go. I think you can push the animation in a lot further of these pieces. I think you first monster is your best piece so I reworked it a little bit. I added movement to the tentacles and more to the head. Obviously it looks pretty rough but I think it's a good detail you should push to make this monster really look unique. I like the way the bottom right tentacle is wiggling lol! Also, you can see the breathing looks a bit quicker and smoother. I think you should concentrate on one project for now and ask for help on here.