I agree with most of the posts on here, so that's a good start!
Fast and Furious films (I can pretty much quote anything from the 1st film)
Inglorious Basterds (just brilliant, excellent performances and Frau von Hammersmark.......mmm mmmm mmmm)
Inception (Just love the soundtrack, the feel and style of the film)
Hot Fuzz (ITV2 favourite, good for when there is nothing else on)
The Dark Knight (again great style and Joker was intriguing)
Bourne trilogy (good action)
Gone in 60 seconds (when Eleanor jumps, it brings a tear to my eye (even if it is low budget CGI!) and I love the opening track by Moby).
Tomorrow Never Dies (My favourite scene is when he steals the encoder and makes his way back to the car park, escapes with some amazing weapons and then bins the 7-series 5 mins later)
Casino Royale (stylish) and the other Daniel Craig ones if they are on TV.
Home Alone 1 and 2 (never get bored of these two!)
Django Unchained (really good film even if it is quite long)
There are more great films I've seen but these are just the ones ones I've seen many times.