I am a complete and total cinephile! I really like lesser known "sleepers" or "indie" type films. A recent film I saw from this genre was a thriller called "Godspeed." As demonstrated by the success of "Paranormal Activity" these indie type films are getting better all the time. And, like PA, they have a potential to make a lot of money for little investment.
I like Action Movies based on Military or Air Force..I also like movies based on some real story e.g. Pearl Harbor etc.