Potentially interesting, but overall useless, questions to ask someone for:
Their favourite colour
Their favourite movie
Their favourite actor/actress
Their favourite television show

It’s a little more interesting to ask someone for their:
Cell phone number
One of their defining moments in their life
Name of a beloved stuffed animal
Preference of a dinner companion if said dinner companion is someone who is dead and not related in any way

I’m pleased to tell you that I ask the more interesting questions.