I am not big on leftovers or wasn't into it, was in jr high when my dad lost everything, he grew up during the depression so everything on sale was fixed and leftovers were big. I remember one time he fixed bean soup by the sixth day he made into beans and franks. That still fascinates me to this day. Grew up fishing all the time during the summer, small game in the winter when I was a little kid.
I guess I am different, now love cold salmon, but really different love fried fish cold for breakfast.
Leftover pork or beef gets cut up cooked in a skillet so it gets crispy, oh yeah if it's leftover pot roast cut up the meat potato carrot and fry crisp in a skillet for hash and have fried eggs over easy on top.
Least favorite food is head cheese or souse, it's a textural thing can't get past the rubber chewy texture, blood sausage is not big with me either, it's rather bland/chewy.