Overly generous. You might be good at holding onto power and convincing your long-suffering people that they really have never had it better.
So he's good at holding other peaceful countries like Japan and South Korea to ransom because they don't want to get into a fight. So far, so dictator, but I don't really accept the hypothesis that this means he wasn't crazy.
Something I read in another report which I thought was hiliarious:
"Official accounts attributed his demise to mental and physical exhaustion while riding on a train" - imagine how much exhaustion the Koreans pushing the train felt.
The guy was a nutcase, if measured on any normal scale. He was willing to let his people starve in order to live like a medieval king. If he's so well educated and read, then he knew what he was doing.