I like the yellow one, but you need to flip the mouth horizontal because the tongue looks wierd.

6/10

You understand texturing, I approve. Have you considered GATA?

that lemon/orange head is pretty fun, i like that.
your stuff looks... different, sorta reminds me of fawflaw's stuff
If you plan on sticking around, take a look at gata

Thanks you guys
I do plan on sticking around, so I definitely will make a visit to your guys' board, I don't think I wanna join just yet though.

Edit: Added one more.

youre new here, i think i dont believe that. your art is simple, yet exciting i barely see those new members make heads like these. youre excellent, my friend :3 10/10

i suggest you to make the mouth out of all the lower part.. maybe in a alien purple
add some strands of saliva as well (wont be hard u seems good at shading).

a few wrinkles under the eyes and a bit of shade here and there.