Death Note = Best anime ever.

1. Protagonist = Antagonist

2. Other Antagonists = Protagonists

3. The twists man, THE TWISTS

4. You're never sure who to root for.

5. Once again, the twists. It's so intelligent it keeps surprising you time and again.

I can't say much without spoiling it. Here's the first episode. After episode 2, I can guarantee you'll be hooked.

Edit: ...Finding a good video of the first episode is actually difficult. Once you find it, here's the second:

Wot?

???