Depends HUGELY on a person.
I hesitate (i.e. take time to consider) for ALL questions I intend to provide an honest, as opposed to obvious answer.
I hesitate for "Do these jeans make my behind look fat" and I hesitate for "Do you like working here" (and myriad other questions in between).
I want to provide a considered, accurate, detailed and granular answer.
If anything, if they answer with immediate and resounding "Yes!!!", I'd think it was a fake, canned answer rather than one they gave genuine thought to...