In alot of Japanese and Korean films I see them using FAMAS (Clarion) alot as well as the FNP90. I've never seen the Galil (Defender) used in any films. In the TV show 24 I've seen the M4 (M16) and MP5 used alot. In Mr and Mrs Smith the movie I saw them use MP5's, M4's, and shotguns as well as automatic pistols which was pretty cool.
The most popular guns in media are M4's, MP5's, AK-47's, FNP90, FAMAS, Desert Eagles, Duel Berretas (John Woo films), and Shotty's.
Which makes me wonder WHY only certain guns are depicted in CS and others are left out? Is it based on guns actually used by any CT forces in the world today? Like the Galil to me seems like a weird choice to include in CS as well as the Sig Commando. The UMP gun seems also like a weird choice to include in the game as well.