I prefer L myself. He is my forever favorite, and I am with him on every decision. I believe that Light belongs in the 'crazy house'. He went insane with power and began to murder innocent civilians in an attempt to keep his reign as Kira going. He put himself above others, and wanted to rid the world of evil, although he had become the true criminal himself. I believe that Light had good intentions in the beginning, but as time went on, he realized that his plan was more complicated than he had originally realized.