The MD-80
The MD-80 has caused a good amount of violent crashes and passenger deaths. For some reason, it's still in operation. Delta and American Airlines have both admitted to using this model of the plane in recent years. No, thanks!
The Bombardier Dash 8
The propellers on this plane always sound like there's something wrong with them. Crosswinds can easily cause this plane to fall off course and horrify the passengers on board. There's also a super light weight capacity, meaning that another plane would have to fly out with luggage most of the time.