This is AWESOME. The lines are great and you have an amazing sense of anatomy - I wish I could be as good as you.
My only problem with this is the colors. The background is kinda lacking and the big blocks of solid color seem really amatuerish to me for some reason. It's just not satisfying with the awesome lines. Supermans hair is GREAT, but everything else seems so... flat.
Not meant to be a critic or anything, just trying to help out a little on your next project
I do have a problem with clean lineart. I´ve noticed I tend to go too simple on the colors and leaving it just that way. Thanks for your comments! By the way, the lineart is by ~al92 . I did the colors. And I wish I had his sense of anatomy too, hehe.