I like this! his eyes look cool and I love your little signature at the bottom. His mouth seems a little wierd though, maybe a bit too high. (Although it could just be me being picky) Overall good job!
I agree that his mouth is a little too high. If you have photoshop, that's something that could be fixed quickly. I don't see enough artwork of Vegeta in SSJ4. I hope you do more ^_^
I'll have to look into that. I have the paint shop feature on my computer, so maybe that will help. I agree that there are too few pics of him in this form. The pic I was drawing this from was only a thumb-nail! I think he looks so good as SS4. We should start a revolt saying, " More SS4 Vegeta!"
-EBS