1. Dialogue. I even prefer over-written dialogue to flat, uninteresting dialogue. At least it's trying to be clever.2. Looking through my favorite movies I seem to enjoy women who go insane over the course of the film3. Manic Pixie Dream Girls. I know they're a fantasy construct, but I'm a nerd and I give into the fantasy. When they're problematic or trouble I tend to like them even more. 4. When something terrible happens and the film cuts to another character far away. There's no way they could possibly know what's happened - no Force powers - and yet they give a look like they somehow know things have changed forever.5. When all the suspects are gathered together and the mystery is solved. (You asked for "egregiously corny".) I would also apply this to courtroom finales with everyone in the audience and boxing matches, though I'm a sucker for the characters in the audience. People watching the fight on TV is a different matter.
4. Kevin Costner being fatherly