If you had one wish, what would it be? 

You can give two answers: One wish that might come true (even if it's unlikely), and one that is not limited to the boundaries of reality whatsoever. Be as specific as possible, no general stuff along the lines of "everything will be ok". 

I'll start:
The anything-goes-wish: That I could travel back in time and give 13-year-old me a set of specific instructions what NOT to do. 

The unlikely-but-possible wish: Honestly can't decide, will probably update.