Uh, the people who complained about your earlier sprites were giving what's called "constructive criticism", not bad comments.
First off, why are you making the picture THAT big, and the actual sprite so small compared to it? I mean, you've got so much unused white space there. Most characters are usually drawn within a space of just 70x70 pixels, not several thousand pixels both ways. =S
Second, That Sonic doesn't even look like he has a nose.
Thirdly, why are you still trying to make character WADs, after several people have suggested to you not to do so?