Nearly every time myself or a family member has flown in recent years has been a frustrating, expensive, miserable experience. Huge delays, entire cancellations right before boarding, bags taking hours to be dropped, cramped and awful interiors, and that one time the emergency exit door beside me had an air leak which caused an ear-destroyingly loud squeal sound once we got up high enough.
Legitimately the most unpleasant form of transportation I can think of while also one of the most expensive - at least for domestic flights.