A BN Islander or Trilander(?) from Antigua to Barbuda and return. Revenue flight, but a charter. As you can imagine it was LOUD LOUD LOUD! and also a bit long in the tooth. I've tolerated most aircraft, perhaps helped by being interested in aviation and haven't 'hated' any aircraft. It's more the other passengers or a tech issue causing delays or weather making the flight uncomfortable/dangerous. A flight on a BA777 with half my footpace taken by a large metal box for the in-flight entertainment. 10hrs of discomfort and no sympathy from either BA or the crew.