Really hard to nail mine down to any kind of list because I love a lot of movies. Definitely high on the list would be the Back to the Future trilogy, the original Star Wars trilogy, Star Trek(the 2009 film by JJ Abrams), Batman(1989), and The Last Starfighter. Hard for me to give those any order though.
"Geez, we've been back together for five minutes Doc, and you're already talking about the end of the universe."
"Stupid, stupid rat creatures!"