Anime News Network is running an interview with Takeshi Obata, wherein he mentions Death Note.
Reporter Katriel Paige caught up with him at New York Comic Con to ask questions, including one about how difficult it was to capture the 'cat and mouse' thinking processes visually in the Death Note manga.
After an intervention from editor Koji Yoshida to say that was surely more to do with Tsugumi Obha than Takeshi Obata, the artist did answer the question. He replied,
... in Death Note, a lot of the characters are borderline full-fledged villains, so it was important to capture those manipulative facial expressions so it looked like they were thinking diabolically, just because their faces looked manipulative.
So many of the Death Note characters are 'borderline fully-fledged villains'. Anyone got any thoughts on that? Personally I think it's fair comment!