"Worthwhile", "Fulfilling", etc.
That's really the common denominator among everyone here who has quit.
When you're a kid with no job or anything like that, getting the new high score, finding secrets, beating bosses and getting "achievements" actually feel like achievements. It's utterly meaningless when compared against advancing your career, creating works of art, traveling, romantic life, etc.
If, as an adult well into your 20s or beyond winning at games is still a proud achievement, you may want to take a step back and reflect on your life up to this point.