Oh easiest answer I have had to give tonight. Whataburger is the clear favorite. I used to go to JITB but they seem to believe the best way to market something is when it is a popular item..... kill it and take it off the menu. i.e. - they used to have this AWESOME patty melt. They took it away and the last time I was in a JITB they just ignored me at the front counter. I am a Whataburger convert and will NEVER go back to JITB because of that experience and their terrible marketing decisions as indicated above.
Depends on whast I was in the mood for
Tacos it would be Jack in the Box
Anything chicken Whataburger
Most burgers Whataburger even though I like Jacks sandwich on Sour Dough