I have to say, despite it's obvious lack of good role models, I find this series to be beautiful in it's own special way. It takes a deep look into the human condition, such as the way humans keep appearances in public and only reveal true thoughts anonymously, etc. It has a dark, noir vibe but manages to be lighthearted and thought- provoking at other times. The storyline revolves around three protagonists, Light, L (also known as Ryuzaki) and Misa. *SPOILER* all of whom die tragically at different points in the series. L was killed by Light, Light was killed by Ryuk the Death God, and Misa, after realizing that the two people she cared about most had died, comitted sucide. The story had a very tragic end that left me crying for days, but it truly is a beautiful piece. The motto seems to be "Death is eternal, life is only once" a message that is delivered clearly and coldly with the deaths of all three protagonists. Despite all the death and suffering, this story manages to be philosophical as well, asking the reader weather or not the evils of murder are conditional, and letting the viewers choose what is good and what is evil (there is a strong "Team Light" and "Team L" vibe among certain fans. I happen to be part of the latter team. lol)
...Now, this wouldn't be much of a review if I didn't state the negatives of the series...
Firstly, the series is quite violent, showing dramatized heart attacks and other, bloodier deaths on a constant. Secondly, though the english version seems to have had it's mouth washed out with soap, the Japanese version boasts quite a lot more swearing, including infamously dropping the "F bomb" during the show's opening song several times. The role models are obviously rather negative, but not overly so. As for sex...well, there's no actual "doing of the deed" so to speak, but there is a significant amount of sexual references. These references include an implied (note IMPLIED being the keyword) almost-rape scene near the beginning of the series, L's sometimes voyeuristic tendencies, and Misa's generally inapproriate behavior (including telling Light that he "can use her any way he wants") and revealing outfits.
..And yes, I know this is an extremely long review, but I had a point to drive accross. WATCH THE SERIES, THE MESSAGES OF GOOD AND EVIL ARE PRICELESS!! LOL