Physical changes:
6' 115 pounds
Well defined muscles, but not bulging. IE, you'd only see them if I was shirtless
Very fast. Very, very, very fast.
very strong
very durable. An example would be being able to survive a single 9MM to the torso without hospitalization
fairly large, fully functional fuzzy cat ears on top of the head, replacing normal ones on the side.
Claws, fangs and heightened senses to match above
A tail, about 2 feet long, to match above. Fur would match the fur on the ears
The ability to disguise as damn near anything I wanted
The ability to be absolutely silent
Nine spare lives to use if I manage to die by non-natural means anyways.
Stig-like driving abilities
Able to use just about any weapon imaginable
Custom fabrication and repair skills that would put MacGuyver to shame
Non-physical changes:
A ton more charisma. One of the guys, if you will. Nice to be around
Some more luck
Fearless
Able to pull off one liners without cocking it up
Funny
Complete badass
Not whiney
Brilliant with tactics
a knack for getting there exactly when needed
Come to think of it I wouldn't mind being that in real life either.