My older sis harbored a vicious yellow fiend she named "Puddy Tat", a nuisance and biter all his life. The only time I felt a moment of affection for him was when he attacked a particularly abnoxious livestock feed salesman by jumping on him from the top of an old refrigerator, ripping a strip out of the back of the guys shirt from shoulder to belt. The memory is still vivid after almost 50 years.
No, I'm not a cat-hater; just referring to one cat who wasn't easy to love.