According to the Urban Dictionary, the expression "whatever floats your boat" means
[...] whatever "soothes your soul" or whatever "works best" Aka- Whatever you feel like doing.
Is it possible to use "float someone's boat" outside of that specific expression? I'm thinking of conversations between co-workers or acquaintances, where the goal of the asker is to find out more about the other person, especially what drives them personally, but without sounding like having romantic interest.
So Peter, what is your driving force in life? What floats your boat?
Would it be used by native speakers? Within which relationships (close friends, acquaintances, colleagues) would it be considered polite? What would be a good alternative expression for this kind of query?