One person says "man, that was pretty hard/tricky/challenging to get through, but damn was it satisfying!"

Another person says "Good fucking God that took forever to do I never want to do that again!"

One went through something challenging while another hit the same button for hours on end without any real thought, strategy, or interest.

Do you want to know why some people have over 200+ hours in a game like Street Fighter? Because short bursts of challenging/satisfying/addicting fun are accumulated over time. It isn't just one long string of boring. That'll burn anyone out after awhile. That's called a time sink, and there's nothing fun or challenging about that.