The best part of White Castles or Kystals for me is not so much the burgers but the riff-raff that you get to rub shoulders with at 3 am...
As far as fast food? Wendy's. I rarely go but when I do I really like them.
I agree with 65LA, there needs to be a drip factor for a good burger to be a
GOOD BURGER.
-John