Which futuristic technology would you accept in or on your body and why?

I would pretty much accept any technology that brings me closer to being a full android or lengthens my lifespan. Artificial brain, tracking tech, etc. I would be willing to accept a lot of compromise for eternal life and I feel this route is probably has the best chance of actually happening within my lifespan. Cyberhorror aspects aside, I figure once the lifespan increases, given an infinite period of time eventually the problems will sort itself out. If it gets too awful I assume I could probably maintain enough control to off myself at some point so it's all good.

Also, I know the chances are still very small, fractions of a percent or whatever, but its non-zero and most other avenues seem to be just flat zero outright.