I'd like to say the best burger I've had is from some hipster hole-in-the-wall, but all of the local places around here ruin their hamburgers. They're always dry, overcooked, and covered in a thin layer of charcoal burn.

The best burger I've had is from http://www.redrobin.com/. The banzai burger (pineapple and mayo).
Yum.
What's your pick?