>>456504I don't know if the last anon is right when it comes to keeping away from character design. I know that my original characters were a driving force behind my artistic development- having, developing, and drawing your characters will help you no matter your skill level. They're a great motivator, so don't give up on them!
I will have to say that the last anon was right about learning anatomy and improving your technical skills. I suggest looking at real photos of people, or actual faces you see in real life. Slowing down and taking time to learn the human figure will improve your art 2x or more pretty quickly.
Your designs look pretty cool so far! Is there any story behind these guys?