Milan and Rome.
Milan, especially Monday morning and Friday evening, just awful. Big club cabins with fingers clicking left right and centre… Nothing makes a flight like finger clicking…
Rome, during the summer. You either ended up with 100 Italian school children who were obnoxious, rude, horrid creatures with teacher escorts who could not give two hoots what they got up to… OR… Cruise passengers and American tourists who thought they would be able to bring two 4' fake Roman columns onto the plane as hand baggage and no one would notice…