If I were guaranteed an honest response, I would ask what is in my blind spot. First I'd have to figure out whom to ask. My higher self? My guides? God? (whoever that is!) Why do we have a 'blind' spot anyway? Maybe it's a kind of holding tank for the things that we want to work with in this lifetime.
A good metaphor for this might be that of a suitcase when you're traveling. I can't wear all the clothes I've pack, all at once. I have to wear different things depending on my mood, the occasion, the weather, what's still clean and unwrinkled, and … what fits.
Maybe the time between lives is like taking all the clothes to the laundromat after you've run out of things to wear. In the meantime, I work my way through what I put in the suitcase before I was born. These would be the things that I anticipated that I might want to wear, or work with.
So, life could be a gradual and interesting process of working through the things in my blind spot. The question is: could I handle seeing everything at the time of my question with the guaranteed honest response? Hmm.