Pretty good artwork , you can see a slow changing of the style over the course of the gallery.
one small nit-pick is that in some of the pictures the noses are outline as a distinct triangle and it looks weird somehow (I just can't put my finger on it)
I'm gonna guess your brain is reading them as triangular holes in the characters faces Like in this one /s/52a2dc30aa/2698888-324 Even I can kinda see in that case, but for most of them, I really don't mind it, their art is already so loose that I kinda like when they get even more abstract