I have several, but whenever someone mentions guilty pleasures, Event Horizon is one of the first ones that pop into my head. While no masterpiece the film is incredibly well shot and made an impression on me when I was younger. And it's a lot of fun in a certain kind of way.
I don't feel guilty about loving Event Horizon, that movie is a sci-fi horror classic.
Now Valerian and the City of a Thousand Planets, that's a guilty pleasure for me. Terrible main characters, terrible chemistry, script is something to be desired, but man I will watch the shit out of that film any chance I get.
Event horizon is so good. Very few other films combine sci fi and horror so well.
If we’re defining guilty pleasures as “no masterpiece but I could watch them any time, any reason”:
Groundhog Day
Short circuit
Final destination series
The village
Signs
Resident evil 1
The burbs
Predator 1/2
Constantine
Face/Off
The goonies
Sideways
Equilibrium
Revenge of the Sith
I just rewatched Fired Up! Last night. Also far from a masterpiece even as far as teen comedies go, this one just has the perfect tone and sarcasm for me.
Bunraku. Its like Sin City, but the movie set is a giant paper popup book. I like the somewhat serious yet cartoony undertone and always love to see Woody Harrelson or Ron Perlman on the screen. I've never seen a film quite like it.