I shouldn't say best because it's really all subjective. Note: major HBO bias.
  1. Drama: Six Feet Under
    Also best series finale I have ever seen
  2. Crime: The Wire
  3. Comedy: Broad City
    This is how I feel today at least
  4. Western: Deadwood
  5. Space Western: Firefly
    Why not?
  6. Prison: Oz
    OITNB too but Oz is epic
  7. Miniseries: The Corner
    If you like the wire, you should really see this. And even if you don't.
  8. Vampire: Buffy the Vampire Slayer
    Not that I've watched many others, but I don't feel I really need to
  9. Supernatural Powers: Heroes
    Go ahead fight me on this.
  10. What am I missing...?