Several of my collection are indirect movie/tv influenced:
Desert Eagle, Beretta 96FS, Vaquero, Marlin 1894, AR15
My next purchase is going to be a Storm. Related to TV because I'm already fondly thinking of naming it Motoko after the main character in Ghost in the Shell...it just looks like a gun that would be at home in that anime!
As far as some of my favorite movie guns, other than Desert Eagles and Berettas:
The Mini Gun that's been in T2, Predator, Matrix, etc takes top honors. I will see a movie just because it has a mini gun in it!
Beretta 93R, MP5s, the alien smart guns. Also enjoy seeing 'new stuff', G36s, P90s. I also like to see normal guns that don't get alot of screen time, like a Ruger Mark II or a Redhawk for example.