The orange tabby's always seem to be the most friendly. Black cats are next but they're more selective. My cat is a calico tabby and like most of her color are pretty standoffish. She's an inside/outside cat and generally prefers to be outside. But when it's cold or rainy she stays in and sometimes even sleeps in the bed with me which is always a great treat for me. Thank God, she does her athletic feats outside catching mice. Does Leo not knock over all the pretty ceramic stuff off the top of the tank? I can't imagine what he would to to a Christmas tree.