Would you prefer supervision, supersmell, superfeel, superhearing, or supertaste? And what about the other senses of the body that are not part of the quintet? Think balance, temperature, and even the ability to feel where all your body parts are (you can close your eyes, wave your hands around, and touch your knee)

For me, I would pick supervision. It would be really cool to see better in the dark, have built-in camera zoom, and see in higher detail.