I'm really impressed with Ovid's testing experiences. I think there's an interesting psychological phenomenon related to testing and exercise and all those Good Things. When I do them, I know they're good. But they just aren't what I find fun, so I don't do them as often as I should. There's a difference between the "feels good when I stop" and the "feels good when I do" that means I get addicted to coding but not to exercise or testing or vegetables.