I of course love dragons, as many do. I also like werewolves and especially winged wolves.
Probably my favorite creature is shadow creatures, espicially ones with the cow/dragon/lizard skull type heads,
not unlike the way the OP's so a looks, btw 
I will talk to lengths about shadow creatures - I have a character who is mostly shadow creature, with a few other creatures/species mixed in.
I love Mothman and the one lady who makes people vomit and has a plane part attached to her or something? I forgot what she was called but definitely interesting. I also like Black Shuck, I have a whole personality in my mind for him.
I really like smiledog, I don't actually know then story but I love the picture and have made up my own idea of who he is and what he can do. I think my favorite genre of creature is horror, I just can't get enough terrifying beasties

Hidebehinds (the character I mentioned earlier is part hidebehind) are interesting, if limited in their documentation. Living puppets are pretty cool as well. Especially the fnaf animatronics

even if fnaf is oversaturated I'll still love foxy and the gang.
I also like Herobrine from Minecraft. I know it sounds weird, but the way herobrine usually looks is the defualt player skin. So imagine if you started seeing a figure identical to yourself, staring at you in the distance, always just out of sight, with glowing white eyes.
ugh. (Nobody steal that btw, I want to use it in a story XD jk, do whatever you want).
And that's not even getting into the SCP foundation... I need to stop, this post is getting huge already.