After seeing the anime 10 times and having watch the movie, it was time for me to read the original manga.
Waouh, the original work is much better: i admit that they've done a great job with the anime but there is so much more details here.
Light is mindblowing (litterally...lol) and L is a genius. Going through all the volumes, i'm amazed again by the artwork and the plot, complex but managed with brio by the author.
This story is one of the few story that i'll remember ever!
I think that even if you're not fan of manga, you have to read this once.