Negative, for me most of the time. It really depends on the transgression.

If it was (for example) something that probably should have been remembered, or something that just needs to be corrected, I suppose, than this works best.

if it is more During play than Ive found that positive punishment is much more suitable.

Discipline is a necessity for any transgression, the dominant partner however needs to determine what is the most suitable course of action that will correct undesirable behavior.