Over: High School Musical
Under: The Breakfast Club
Movies with very long names, over 7 words long. The longest one I know is Dr. Strangelove; Or How I Learned To Stop Worrying and Love the Bomb. Feel free to use that one if you’ve seen it 
This is quite difficult hmmmm
Over - Pirates of the Caribbean Curse of the Black Pearl
Under - Harry Potter and the Chamber of Secrets
Movies that involve Whack Nicholson
Ummm, moving on… Yay, an over/under for my favorite actor!
Over: This is hard, but maybe The Departed
Under: Chinatown (among many others)
Movies that won Best Picture.
Over: Titanic
Under: Crash
Movies about the presidency.
Over: JFK (good, but not great)
Under: W.
Dreamworks Animated Films
Over: The 4th Shrek.
Under: Spirit: Stallion of the Cimarron
Horror movies.
Over: Army of Darkness
Under: Halloween, Ghost Rider
Concert movies
This is not horror…
Over: Jonas Brothers the 3D Concert Experience- need I explain?
Under: This is It, and U2-3D (it’s a tie)
movies adapted from comics/graphic novels
Hmm, that’s a toughie.
Over: Spider-Man. I didn’t like the original as much as the second.
Under: V For Vendetta. Most people don’t even know about the book.
Movies that start with the word “a”, like A Streetcar Named Desire.
Over: Avatar, I still like it though
Under: (Tim Burton’s) Alice in Wonderland
Simpsons characters
Over: Homer
Under: Sideshow Bob
Post-apocalyptic movies
Over: 9 (It wasn’t bad but I was a little dispointed.)
Under: 2012
Animated Sequels
Over: Ice Age 2
Under: The Rescuers Down Under
Alfred Hitchcock directed movies
Over: Psycho
Under: The Lady Vanishes
Movies with a villain as the protagonist.
Over: The Godfather, don’t attack me, I love it, but I think it’s a little bit overated.
Under: Sweeney Todd, if that counts
Actors
Of course Sweeny Todd counts.
Over: Matthew Mcconaughey
Under: Bruce Campbell 
Movies based off of TV shows…
Over: The modern Scooby Doo movies
Under: The Spongebob Squarepants Movie
Movies that have won Academy Awards
Over: Very hard choice, but I’d probably say Tom Jones.
Under: It’s even harder to pick an underrated one, mainly because they’ll all highly rated, but probably Marty.
Clint Eastwood films
Hmm, tough one. I love Clint. He’s 80 though 
I didn’t know he was that old.
Over: Unforgiven
Under: Million Dollar Baby
Christopher Nolan films.
Hard, I love all his films
Over: The Prestige
Under: Insomnia
Fictional animals