I'll stand by "contradiction in terms." To hope for anything better is is to expect some alteration of human nature. Of course, everyone always has the option of being nice, but the things that make a man think being a dictator is a good idea are the things that take away the nice options.
I'll reiterate, are all parents who don't let their kids run the household bad? Most reasonable and responsible parenting entails being what would qualify as a dictator at the societal level. The reason is that kids are not generally capable of protecting their own interests, so letting them do so (by being "democratic") is irresponsible bad parenting. There are situations where the same is true of the adult public, so it doesn't require that a person not be "nice" in order to be willing to dictate the rules. Wanting to go from a democracy to a dictatorship system is bad in the long run for the reasons I explicated, so that would require not being "nice", but that is different than a person who found themselves with dictator powers being willing and able to use them for good.
The comparison of a parent to a dictator is silly. The relationship between an immature child who must be protected and taught, is nothing at all like the relationship between a dictator and a citizen. It's a cute analogy, but it doesn't work.
No man is evil in his own eyes. If this is true, even the most despotic dictator believes his actions are for the good.