Wings, gills, and the ability to run really fast like a cheetah. But if I got wings I wouldn’t want some real big and ugly ones. Pretty ones, but still good enough so I can fly.
ahem
Enhanced senses
Functional wings (just strap those suckers onto my back)
Retractable claws
Ooooh, and throw in some venom, too, just for good measure
And replace the hair on me with a nice, soft fur. Not any thicker than hair. Just nicer.
And cat eyes. Yeah. I’d be a hott part-animal. 
Gills and lungs teeth of a shark, skin of an Elephant and a large scorpion tail with lethal poison, maybe a few hundred pounds of extra body muscle and a couple of sharp horns on my head.
Though the comical possibility of a sperm whale penis would be funny to imagine, since you’d need a wheel barrow to move it with, and any time you got an errection all the blood from the rest of your body would be sucked out into your enormous phallus.
The flaming red ass of a baboon…
…oh wait…I already have that…where’s that ointment…
The libido of a rabbit.
I’d like the strength, agility, and reflexes of a cat. Scaling up to human size, I could probably jump onto the top of a house, outrun cyclists, move nearly silently into striking range, take a person down before they even knew what hit them, and bound away so quickly I’d be long gone before anyone else notices.
This would be very helpful for my other job, moonlighting as a Ninja Assassin.