Other things about Death Note that I appreciate

Light at first lets loose the implication that he has access to police info as a way to drive a wedge between L and the police force. He reasons that it's human nature to not trust someone who is suspecting you but at the same time, is not as vulnerable as you are (e.g. working on the same case as you but refusing to show his true face or reveal his true name). He's right in the large scheme of things, but in the end, the other members of the Kira Task Force never, ever lower their belief toward L. Why? Because of their sense of justice.
Also both L and X Kira being murder hobos. Light really had to just let Raye Penber tail him a few more days and then he'd be off the hook. I mean, L would probably catch on anyways, but he killed Penber anyway because his first solution was to get rid of whomever might get in the way. Instead, he gave L a solid clue (or two)  Basically I really like that from the beginning, Light never made actual allies. Everyone was either someone who could help him (a tool) or an obstacle, and so even if he had won against Near, he wouldn't have had a single ally at some point. Thus, he was truly doomed from the beginning.