In addition to everything listed so far...
I can't bring myself to eat anything that is higher on the food chain than we are. Bear comes to mind. I would never eat bear. Pretty much any carnivore.
And for those who say they would never eat insects...ever eat lobster? Shrimp? Crabs? All they are is GIANT BUGS THAT LIVE IN THE OCEAN!!! "No, they're crustaceans," people say. My a$$. They have a bunch of legs, an exoskeleton, and antennae sticking out of their heads. They are BUGS!