Reading this about flow and especially its 3 conditions, it makes me thing about online and video games, about how you immediately know whether you're winning or losing, there's a clear goal, and you're in control. There's a reason they're so addictive.

Exactly. There a quite a few studies which examined this phenoma :)

This kinda reminds me of Buddhist attentive mindfulness meditation, losing oneself in the object of one's contemplation, and the principle of anatta, no-self.

Yeah, I guess there are different words describing the same experience.

I must say though that there's often work required before reaching the level of proficiency where you enjoy an activity. Learning how to read, learning to play the piano, learning how to ride a bike or drive a car — those were probably not enjoyable activities to begin with. So people should definitely not drop things they don't enjoy doing, unless they've really made an effort.

You are right. I maybe should have added this as well. The beginning of something new is probably not enjoyable at all, but after a while this might change. I had more the things in mind people are doing for years and still don't enjoy.