From my own personal encounters and studies with both Tantric and Zen Buddhist monks, I have found them to be humorous, warm, charming, and compassionate.
My mother was the tough-as-nails disciplinarian who showed very little to no emotion. My father, on the other hand, was a study in contradiction. He was the fire, hell, and brimstone preacher, while also being incredibly gentle and forward thinking. I identify with him a lot.