Character Design: Project 1:3

Final Result:

Some issues pointed out during the class critique:
1) The final drawing in the center seems stiff compared to the sketches.
2) The left eye of the final monkey doesn't look natural. ("Asian")

I can see both issues. Something about my variation of sketches too is bothering me. Does a normal character design also include creating an official front, back and side view of the character? Is this not a typical display of a character design?

Please comment! Anything is helpful. I'm doing two more character designs
based on animals and, if anything, I'd like a positive progression.