All of them. There's just something relaxing about a good smoke, so as long as it's not a dog rocket, I'm probably kicking back and smiling.
Any of the older (pre-99) Cuban cigars are always a treat. Old Davidoffs and Dunhills as well, whether CC or NC. Almost anything Tatuaje or Pepin, especially with some age on it, will make me light up like a Christmas tree.