I'm surprised...I thought a modeler of your talent can easily see the crotch area is somewhat distrubing to look at. Here's the thing, in DBZ, and pretty much any super hero comic, show, etc. where people wear skin tight uniforms the crotch area is only a large V. like...
I .......I
I..\_/..I
I..I..I..I
I_I...I_I
I_I...I_I
\/.....\/
(ignore the dots, its the only way I could have it appear as empty space.)
It's crude and I dont feel like going into Paint shop pro to go into detail, so please work from that. Anyway, what your model shows is what looks like the outline of his genatalia. It's DBZ, its unnecessary, and it still looks incorrect if you were going for that look. It's a shame to, because the model is excellent otherwise and heavily resembles it's Budokai 2 counterpart.
Other than that, can't see much else wrong with it...think the muscle structure in the arms could be altered, but its not a big thing, you can keep it as is. (and what I mean about the muscle structure is that the biceps are in FRONT of the triceps, unless the arm is being looked at from the side, u cant even see the tricep behind it. But with his arms spread you can see the triceps next to the biceps? Incorrect, use your own arms as an example, its what I do when I draw.)
Hope you finish it soon, looks very good.