Villains

*cough*Trevor Philips *cough*

Snape

Crowley~

Also they should serve the story being told. A complex character is pointless if they don't take the story anywhere.

Walter White of course! I think he is one of, if not the best, television character ever. Of course I have yet to see all the shows! :)

Pagan Min did it for me

Moriarty

The hound, joffrey, cersei

the idiot that is punpun

The Bird in Unbroken did that for me. I loved him as a character.

Joel from the Last Of Us.