Too many films I love, I can't pick a favourite... so here's one film I've seen countless times because it's that damn good.
The Blues Brothers (1980)
Recently watched (in the past month):
My Name is Bruce. It's Bruce Campbell. As himself. Wierd, and fantastic for anyone who is a BC fan.
Dune - Awesome.
Croupier - Clive Owen at his finest, great film.
Apocalypse Now Redux - Amazing, well worth the 3hr20min running time, wish I'd watched it sooner!
Shutter - remake of a japanese film (I think), and it was creepy, but otherwise a touch poor.
Dark City (1998) - better than The Matrix, but in a slightly different way.
X-Men Origins: Wolverine - very poor, but strangely watchable, perhaps only because I've seen the others.
Star Trek - Great film, really enjoyed it, and then enjoyed pointing out plot holes and silly bits later on.

Definately enjoyed Star Trek (latest film I've seen). Recommended to everyone! Before that was Wolverine Origins which is recommended to Marvel fans and anyone who likes action but wasn't the best of films.

Brilliant film, rather underrated in my opinion. Its one of those rare movies with a really bleak ending with out a single ounce of hope. Unlike "23", Jim Carry should have been hit by that bus and DIED.

Last movie in theatres i saw was The Reader... very serious movie, takes a huge twist in the middle that you don't expect unless you read a synopsis before the movie. More a character study than anything else, so I don't recommend it if you need some action, but otherwise good.
Last dvd I saw was Let the Right One In. Good movie, very European in a good way.
Other favorite movies:
boondock saints (already mentioned)
the usual suspects
memento (already mentioned)
wall-e (you know its awesome)
spaceballs
The Incredibles
aaand a lot that i can't think of off the top of my head.

The worst (best?) part of it is that you can see the inevitable hopelessness of his (and everyones) situation, even if he tries to make the best of it at the end.

Favorite Films
Blade Runner (The Final Cut)
LA Story
WALL*E (Presto, the cartoon before it in the theater, was hilarious too)
Dr. Strangelove
Animal Crackers
Metropolis
Last One I Saw
Blade Runner (due to the other thread here)
Recommendation
(besides any of my favorites you haven't seen)
The Unbearable Lightness of Being
or
the MST3K version of Fire Maidens of Outer Space--so much padding that Joel and the bots do more talking than all the actors combined.

Metropolis the old film or the anime? Because they're both excellent. Also, any of the MST3K are great.

The old film. I confess I haven't seen the anime and had forgotten it existed when I posted that. I have the Complete Restored version that came out a few years ago, which contained all known footage at the time in the originally intended order and filled in some sections of the original that were cut later. Someone has since discovered a virtually complete version in a library in Argentina so I may be buying it again in a few years, heh.

That came out already?! I saw Terminator Salvation last night, it was good simple fun.

Recently I saw Last Night. A movie about end of the world from Canada.
It won bunch of awards and is from 98.
It is story about last night before the world ends showing around 7 different people and how they are trying to spend their last few hours on the planet, but mostly concentrating on one guy and one woman.
Very interesting and i really recommend it.

Last 2 watched:
Sin City (the extra disc with the seperate stories)
Dark Knight
Favourite movies:
Monty Python movies
Blues Brothers
The Big Lebowski
Pink Floyd's The Wall
Pulp Fiction
A movie I found bad but nevertheless enjoyable was 'House of a 1000 corpses'.
It's a boring horror movie but in my opinion probably the horror movie with the best sound effects and music.
Sound really completes the movie and whenever you're thinking about turning it off there's some great sound effects or music that makes that you keep watching.
I really enjoyed the sound more than the movie.

Watched two films in the past few days...
They Live (1988)
and
The Lost Boys (1987)
A couple of 80s classics, although I preferred They Live of the two of them. I'm a big John Carpenter fan

The last "favorite film" I saw? "[url=http://en.wikipedia.org/wiki/The_Son_(film)]The Son[/url]"
Watched it on Netflix several days ago, watched it again. It certainly goes into my "best ever" list.
EDIT: On second thought, don't read the link, it's spoiler, and inaccurate. Just look for it. It's by two Belgian brothers.

My Bloody Valentine 3D. One of the best remakes, plus the original is the Canadian slasher classic. Check it out.