I had a Maine Coon that was mean as a witch to anyone that walked in the door. She would hunt down strangers and attack them. But she loved her family as deeply as she hated strangers. She was all attitude, in fact even tho her name was Duster, we called her KittyBitch. A 20+ pound cat can carry some serious attitude on her shoulders.
She hated flies. My 6'4" son would hold her upside down with her feet on the ceiling and she would eat flies. So I have kitty pawprints on my ceilings!!