I love all my three cats they are loving and affecting. We have had many cats and I have always been the one to go to the vets and euthenase them at their last hour its a horrible experience and has affected me in a serious way, they are true to their master and when you're down the know it and make a fuss of you all of this has lead me to disconnect with them a bit so as not to be affected by that horrible trauma when the fateful day comes. When the day comes that all my moggies are gone I will have no more I'm fed up outliving my pets. So this is not a hate of a pet but the hate of losing a pet rip all my felines.
I've had a few with awful personalities, but I tried my best to tolerate them and give them a good long life. The most evil ones were Camille the rat and Benji the rabbit.