Death note is simply a fantastic story. Being a manga/comics fan has nothing to do with it. Its a great concept, beautifully drawn and well executed. L is quite possibly among my favourite characters in anything ever.
A friend bought the first five volumes of Death Note for me at Christmas - I didn't think that it was going to be my type of 'thing', but so far I'm really enjoying it.
I'm guessing that's as profound/controversial as saying 'Akira is good, isn't it?', but I really thought that I was completely Manga-ed out.