I'm partial to Urushihara myself. On the pro side, the animation is always top notch and most women look great, which is a great deal, but there are a few things that pile up and even the balance:
-Guy insists on doing way too much shit on his own, resulting in LOOOOOOOONG production times. When you add up the fact that his stuff usually have a lot of frames, well...
-Sometimes, the above point results into too much looping animation. Lady Innocent does this a lot in the sex scenes. On the other hand, Plastic Little is even longer and has none of this somehow.
-The man faces are a gamble. The older guy and the nigger in Plastic Little were great, but he sometimes slips into way too fucking girly (Nichol) or really weird creepy faces (The gunner in Plastic Little).