your biggest problem is proportions.
your second biggest is that you don't understand how planes work
It's funny how people post such negative nonsense that obviously doesn't come across as positive criticism. It's like you're mad at the person from not being to a tee with everything.
I think your strength is with faces. Being left-handed has always made it difficult for me to draw as best as I'd want to, especially with facial proportion- I suppose strictly figure/stature is more my strongsuit, but. And I bet you drew and colored that Lebowski face in your signature and avatar; goes to further show how good you are with faces.