Wrong. Black kitties are the nicest kitties. Then any kitty with tabby patterns, gray or orange. Blue kitties are nice kitties unless their owner wrongly calls tthem a Russian Blue or British Shorthair, in which case, the main problem is more with the owner than the cat. Tuxedos can be either the nicest or most evil cats. I got one of the unlucky evil ones. Anything long hair is nice until it develops matted fur and needs to be shaved. Bengals are very nice from a distance. Torties and calicos just have a very low BS tolerance, so as long as you remember that anything you ask them to do at the clinic is total BS so you must apologize profusely for ruining their day, then you can get along with them just fine.