For fast food in the West, In&Out has my vote. I especially dig the toasted buns and the "something special" they have going on with their burgers. I do not like the fries, but then again, I haven't found any fries in the western US that satisfy me.
Your choices are very basic: How many burgers? How many fries? What to drink? Some might scoff at the simplicity, but as a minimalist I enjoy the shit out of it.
This particular location is like two stories. Pretty sweet.