I'm very partial to a standard-issue black-and-white cat
When I was talking to some Cat rescue bods, some months back, when Talisker went to the vets, they said that black and white cats are the hardest to rehome, because they're considered to be "common".
Kai is White and Black, and Zev is Black and White (the predominant colour comes first), and they seem like a fine pair of little furry nutters to me.