Both are utterly necessary. I didn't vote just because neither surpasses the other. You need a leader that everyone loves, but is scarey enough so that no one would even THINK to dare cross them.
Just think about it, have a leader that cares about the little man, keeps taxes reasonable and generally keeps his people happy. Then, someone tries to betray him, he beheads them. The people, who all love the leader, will not only approve, but would have most likely done far worse if they got a hold of him first, not to mention the message that sends about turning your back on your glorious master.
^-^