Good line quality, I recommend challenging yourself by practicing different line weight and playing around with value (there's a lot of good tips and examples on Google), you might find something fun and new that you can use with your art and could even enhance your skills as an artist! :)
I hope my advice helped, I'm actually parroting what I'm currently working with in my Life Drawing classes that I felt was good advice. But overall, looks good! I grew up with Gorillaz and your subject matter in your works are similarly themed (which isn't a bad thing, heck my new account is full of Voltron stuff, you've got more variation than I do), and it reminds me of other artists I've worked with before. Glad to see there are still artists with these tastes!
Keep up the good work! You're doing great!

Good design! The eye travels well fully through the image.

Nice form!