The VG Resource

Yeah.
What can I do to improve etc?

less jaggies and an actual lightsource

also, ears, people usually have those

Ears are there. Just not exactly defined. Jaggies can be dealt with. And light source? Sure thing.

the skinnier guy's shoulders look off. they're either too low, or don't go outward as much as they should, giving them a slanty look.

holy shit i thought you died

omg it's unknown

you gotta catch up with the rest of us man, you seem to be lacking lightsources and your shading is really messy