I have no idea what the best deadbolt would be if I was not home. I would guess one that is locked as I think most B&E would occur through an open door or window.

Being in a room however, like say a hotel room or guest room at a house, i use a $3 door wedge forcing the door into the frame, rather than holding it open. it prevents people walking in when there is no lock. If someone could pick the lock or bust the door down, the wedge will not slide, thus the door literally needs to be folded in half to get inside. More than enough time to figure out a defense.