The Skull Man is an interesting cartoon so far. based on Shotaro Ishinomori's creation, it's a good looking cartoon, that's for sure, but it's not animated in his style.
I'm not one much for dark and gritty shows, but every so often I like watching one. it's only 13 episodes long so that helps.
Skull Man was the basis for Kamen Rider in a roundabout way. I gotta say I prefer the Riders in their live action form, way more exciting that way.