What's great about the site is that it focuses heavily on the different years of the animators and their styles. I was looking for Maeda era references and was about to ask for some character sheets or references here on the forum until I found this. It's really perfect if you want to style your art after a particular style during each era of Dragon Ball. Personally, Maeda is my favourite era of designs for DB, but you can find yours here, I'm sure!
Here's the site
Here's a comparison of Piccolo (just to show what this site has to offer):
Maeda 1988 vs Yamamuro 1993


DISCLAIMER: I do not know if these shots were drawn by the chief animators themselves or another keyframe artist, it does however, show how different the character designs were throughout each chief animators time on the series and Toriyama's influence on their style for the anime
Another:

I know Jacob will love this one, since he seems to loath Yamamuro hehe