well yes i think another mass-cliche genre should be romantic-comedies...
but i think the most cliche part of romantic-comedies is "the end with kiss" part :) when u start to see that movie you can easily guess "who with who" will be lovers and Bingo!!! They kiss each other in the street and the camera goes up into the silhuette of the city :))
Also it is a very common cliche that the opposite people get together: romantic woman& rude-unsentimental man, a man of love& slut woman...and the list goes on...
but i think people still love romantic-comedies and also they serve for Lovers: imagine 2 lovers seeing a horror movie!!! Acceptable? NOPE it is a rule that if u go to cinema with your Darling u should see a romantic-comedy     ( it helps you to u refresh your affir and at the end you will have a great opportunity to kiss your partner)... :)))
well i m looking forward to reading your ideas about other genres...