I've been on a RJ flight where the bin wouldnt close right. After they "fixed it", I boarded and found the bin with duct tape all over it and a sign saying "out of order". Then being scolded by the FA that I brought my larger bag (that doesnt fit below my seat but does fit in the bin).

On a EWR-HNL, after leaving the gate, we got an engine indication. The pilot said "we're going to try changing out the computer/control module and hope that it works. Everyone cross your fingers". "Cross your fingers" or "hope that it works" isnt really what I like to hear right before a 10hr flight.

On another flight, I recall being delayed because they had to replace a light bulb in the cockpit. they said it was their only source of illumination. They have backups for everything on the plane, but not the light??