In no particular order:
1. JAWS (The first two)
2. Jurassic Park Trilogy (part 4 comes out in 2014 SQUEE!!)
3. The Patriot (Mel Gibson)
4. E.T. the extra terrestrial
5. All of the Alien and Predator series of films including Prometheus (yes, I even like AVP 1+2)
6. 28 Days Later (and 28 Weeks Later)
7. The Twilight Saga (I know...I know, but my gf got me watching them)
8. Harry Potter films
9. Star Wars films (yes, even the prequels...and the Ewok Adventure films)
10. The Terminator Series
11. (haha because these can not be forgotten) Christopher Nolan's Batman Trilogy.