If you were only allowed to own one board, what would it be?

I'm curious to see what you guys think is the ideal one board. I kinda figure no such board exist for the broad range of sailing everyone does, but, if you had to choose just one that could probably do a bit of wave and flatwater blasting what would it be?

this is following on from an old thread about big boards for the surf. haven't been on the water for ages so decided to pick up my sup that had been sitting at the shapers for, well, a while now.....

just need some traction grip and i'm away.
i got the shaper to put a centre box in it so the kids can sail it like a long board.
wifey will sup it, and i'll sail/surf/sup it.

now all's i need is.... nothing, not waiting for the wind anymore, oh there is the issue of spare time.

dims are 9'8x31" widow maker fish tail.

pretty happy vegemite.