Snow Leopard.
They may not be the largest of the big cats, but they are stocky, and the most well balanced.
Their large paws and heavy tail give them supreme balance, allowing them to scale the mountains effortlessly, and their low profile gives them the perfect edge when launching sneak attacks on prey.
They are built for ambush so thoroughly, they even lack the ability to roar! The most sound they can produce is a low growl of a soft chuff. ((Most big cats cannot purr, or are built to thick for it to be heard. A chuff is the equivalent to a purr though.))
Personally, i think being a cat is preferable to being a dog/bird/fish/insect. And honestly, chicks dig cats! Especially soft, thick furred cats and are very cuddly with them.