This isn't political - no more than the A-Rod is a douchebag thread - but it is likely to start a fight. So this is still probably the best forum.
So, who makes the best categories: 1) chain restaurants, 2) non-chain restaurants.
For chain restaurants, I think Five Guys beats In-N-Out burger. I also like FuddRuckers because they have some exotic burgers, like boar, bison, venison, etc. But Five Guys is fresh ingredients - Fudds seems frozen.
For non-chain restaurants, I don't really have one, since I generally order something other than a burger if I am eating at Nick and Sams or Jasper, or some similar higher end place.