When did your prototype feel like a true fit? What feedback confirmed you solved a real problem?
What assumptions have you made about user pain points—are they still valid today?
How often do you hear, “This is exactly it”? If rarely, why might that be?
Do you build mainly from user input or from vision? How balanced is your approach?
What feedback do you dismiss too quickly—could it reveal fit issues?
When has trying to please everyone diluted the value of your idea?