Of the big cats, which one is the most interesting to you? Lions? Tigers? Jaguars? Leopards? I personally would have to go with the Cheetah (although I heard that technically it isn't listed as a "big cat", but any feline that weighs in the neigborhood of 100 pounds is a big cat by my standards
Cheetahs fascinate me. Their speed of course, their sleek look, their mannerisms -- they just fascinate me.