You can check this thread weekly for movies to watch. And if you go down the first page, you'll see a link that can let you watch the movies suggested and I posted a description on how to use said site. Hope this helps any to get you your movie fix.
I can recommend some comedies, but I don't know of any spectacular "serious" movies. Robin Hood: Men in Tights Spaceballs Bruce Almighty The Simpsons Movie The Shrek Series
The Godfather (Part I and Part II, part III is unnecessary)
Indiana Jones (the original 3, never the 4th. The 4th was just a bad dream.)
Lord of the Rings
Star Wars (watch in the order they were released)
Jaws
Monty Python and the Holy Grail
The Princess Bride (it sounds like the girliest movie ever, but that's like saying Monty Python and the Holy Grail is a religious film. They're both more of epic spoofs of the genres the titles typically represent)
Every Pixar film besides Cars 2 (if you can only watch one, watch UP)
Iron Man
Bill and Ted's Excelent Adventure
The Matrix (you really only need to watch the first one, the other ones just expand the plot some more, but I guess that's all any sequel does)
The Dollars Trilogy (or any other Sergio Leone directed film, he's such a good storyteller)
Once Upon a Time in the West
Air Force One (possibly Gary Oldman's best performance)
The Dark Knight
Ice Age (only the first one, the sequels were made to make money)
Shrek (only the first one, same reason as Ice Age)
Harry Potter series
National Treasure (I question my judgement to put this on the list because it seems an obvious rip-off of Indiana Jones)
The Fugitive
Saving Private Ryan
Schindler's List
Enemy at the Gates
Dr Strangelove (the best political comedy I've ever seen)
Spaceballs (the second best political comedy I've ever seen)
Men in Tights
Blazing Saddles
The Wizard of Oz
Mary Poppins
Alice in Wonderland (the animated 1951 version)
A Christmas Story
Rango (just watched it last night and it was pretty good for a spoof. so much adult humor that I'm surprised it's PG)
just watched FASTER with dwayne "the rock" johnson. must say overall it was a great movie and i think it deserves to be added to the must watch movie list. movie is rather violent and has language so watch at your own risk lol
I'll have to suggest Napoleon Dynamite. That is a one-of-a-kind movie that I suggest you all watch if you haven't gotten the chance to. It only gets funnier every time you watch it.