Sure doesn't look like crap to me! That's pretty nice. The arm w/ the cannon looks a little flat though. i like this better than the copies. Keep drawing! -amitabah
the only real critique I have is about the arms. Megatron's right arm, our left, is to short compared to the other one. You could fix this by lengthening his right and shortening his left. Or you could lengthen his right to match his left. I actually think that his left arm is the right length. All in all, Its not crap, it's pretty good. I like it , and you need to draw more.
I agree about the length of the arms. Still it's pretty good for your first try (publically that is). The only way to get better is to keep practicing.