Hmm... if I had to judge given those covers, I would say that I much prefer Douke Daisuke's artwork. Watanabe's character designs look a bit too bland, and the characters look like they're in junior high. If I didn't know anything about any of the mangas, Douke's is the only one I would even consider picking up, the others just didn't fit my taste. Plus doku otoko is such a funny word.
