That's a good question. I'm not sure what's unique about mine. I try to make sure that the characters mix between looking cartoony, but at the same time not having ultimate, whacky body proportions, I guess?
When it comes to my manga art, I think it's the way I draw irises. I like having them unfinished, as well as the pupils. I just like them uncolored versus coloring them in. At least for my style, that is.