Pretty much upgrade all limbs, legs for speed, running, jumping, kicking etc, arms for speed, strength, fine motor skills and agility. Phallus upgrade to keep the ladies happy, with multiple functions for vibration, massage and shape/growth variation. Enhanced digestive system to keep the bio system strong, enhanced cardiovascular system for maximum performance and an adamantium skeletal system like the wolverine would be awesome. ONE enhanced eye (multiple function enhancements).
ONE enhanced ear with the ability to vary functions, from enhanced hearing to wireless communication (including 5G, radio spectrum).
Cerebral enhancements to handle the motherload of sensory inputs, enhanced processing to be able to process info as fast a a multitude of supercomputers, ability to store and access info instantaneously. So that I could read a book, watch a video or demonstration and be able to emulate what I've watched any time perfectly.
Ability to charge hands for electro charge (taser, charger), or heat (boil a cup of water just holding it).