Hmm. See if these work any better?
I think it might be the missing of the cheekbone area from time to time (the space between the eye and ear). I mostly see this in pages: 1, kinda 3, kind 13, and 14. Page 11 doesn't irk me for some reason. I feel like the eye also melds into and rotates into this area just enough that the face ends up looking a strange cylindrical sort of flat. If that makes any sense. Ignoring this is a stylistic trait that I see in a lot of anime artist styles, but it doesn't work for me on yours for whatever reason.
I tried sketching something out, but kinda failed to make any point. 1) was supposed to be a bad example but ended up looking half-alright, probably because the sketch turned out looking really anime stylized; and 2) was supposed to be what I meant by the 'cylindrical flat', but I couldn't really show it.
But I think you get the general idea of the area I'm talking about.