It could be any of your choosing. And might I add choosing wisely, as you won't be able to go back on your answer once it's already been said.
Now, as for what power I would choose, it would be between either indestructibility/invulnerability or superhuman speed (ability to run over Mach 10). But if you bond and gagged me and made me choose, I'd have to go with the indestructibility. Being immune to blunt force attacks and penetration would sure as hell come in handy in everyday life!
In addition to my previous statement, being impenetrable would mean I'd have the upper edge in fighting (since knives and bullets wouldn't be able to break through my flesh) and because my body is much thicker and denser than that of the average human's, people would break their hands and feet upon contact with it.
I would pretty much be virtually immortal as I could survive things such as bone crushing falls, car accidents, devasting blows to the head, and much more.;)
If I had to pick a superpower, I would pick superhuman speed. Superhuman speed can be extremely useful and cool to have. For example, you could go anywhere in the world, run over water or up buildings, and having superhuman speed would allow you to heal fast and depending if the The Flash TV show is right, you could vibrate your body at the frequency of air, allowing you to phase through objects. Superhuman speed is totally over powered. Plus having superhuman speed would allow you to help people in need, who doesn't want to be a superhero :)
I'd like to be a wizard say thats not a superpower <a target="_blank" class="media-link" hhttps://en.wikipedia.org/wiki/John_Constantinel="nofollow">https://en. wikipedia. org/wiki/Doctor_Strangerel="nofollow">https://en. wikipedia. org/wiki/Zatanna https://en. wikipedia. org/wiki/Doctor_Strange https://en. wikipedia. org/wiki/John_Constantine