All of my favorite movies are "nerd/geek" or rather I "geek" out over these flicks:
For instance:
The Bourne Series
The Dark Knight
Batman Begins
Serenity
Star Trek (2009)
Star Wars Empire Strikes Back
Raiders of The Lost Ark
Predator
Titanic...wait.
Terminator 2
Taken
Casino Royale
Minority Report