Gotta' jump in and say, 'WHAAAAA...' I miss Skyline Chilli!!! A 3 or 4 way with extra cheese and a couple of coneys to push it down with saved me many a time at 3:00 AM after a night of clubbing in my younger days.
Fat Burger in SoCal. ^ Far better than In-and-Through Ya'.
Not really fast food but, for someone that rarely eats deserts, the fresh peach pie in the summertime at Coco's in SoCal. That's worth a special trip for me.