Back right. My stove has 2 regular burners in the back, and front right is smol, front left is hueg. I used to use the smol one when doing grilled cheese because my pan was crap and that was my only chance of not burning them, but now a normal burner at low power works well with the new pan and chills the grease faster. I used to use back left and then switched for some reason. I guess I also prefer the back just because no matter what I do, the handles of the pans don't stick out, so I can't ram into them and make things fall off since I never pay attention to anything...