Princess Bride is good, but it seems like everyone in my generation (young 20 somethings) thinks it's just the BEST EVAR and want to watch it all the time. Consequently, I've probably seen it more times than any other single movie besides The Emperor's New Groove (which is amazing).
I'm kind of a wannabe film buff. I really like movies, but I haven't seen enough to consider myself an expert.
I think Avatar was grossly overrated, but everything it did was done with style most appreciated in the experience of a cinema.
I think Christopher Nolan, M. Night Shamalanadingdong, and Michael Bay think THEY are why people see their movies, and shove it in your face that you are watching one of their movies every chance they get.
Tron: Legacy was also a pretty bad movie, but it was quite an audio/visual cinematic experience. I think I've only watched it once since, but I saw that one 2-3 times in theater.
Christopher Nolan is so right, I'll watch anything with his name on it. M. Night used to be right (his first 4 major films are some of my absolute favorites) but since his most recent flops he hides his name as much as possible. Michael Bay is probably right for most people, but wrong for many who lament the success of the Transformers franchise. Although, I am tempted to cough up the cash to see the newest installment just to see Optimus Prime wielding a sword while riding a robotic T-Rex. Because that's pretty much what all of film history has been leading towards, right?
My favorite films are:
The Princess Bride (the only movie that gets better every time I watch it somehow), Seven Samurai, The Good/The Bad/& The Ugly, Back to the Future, The Lego Movie, Mean Girls (I know this should be a 'guilty pleasure' but I do actually think it's fantastic), Gran Torino, ParaNorman, Pulp Fiction, and Toy Story.
Gran Torino, that movie is really great but I tend to forget about it. Totally agree about Mean Girls (written by Tina Fey!), Lego Movie and Toy Story too, so good. Although imo in the Toy Story franchise each movie was better than the last.
Ghibli is great, too.
Some of my favorites, stream-of-consciousness style: Crouching Tiger, Hidden Dragon; Rat Race; Shawshank Redemption; Gladiator; any of Shyamalan's first 4 movies, especially Signs; Fight Club; Les Miserables (musical); The King's Speech; 12 Years a Slave; Rear Window; Babette's Feast (look it up - really unusual but so beautiful); anything by Chris Nolan, especially Dark Knight, Inception, and Mememto (need to watch again); The Matrix; A Beautiful Mind; The Fault in Our Stars/A Walk to Remember (They're interchangeable, right?); A Knight's Tale (The better Princess Bride); Gravity (Largely for the physical stress it put you through in theaters); and Avatar: The Last Airbender (kidding...is anyone still reading?)
Also, I get really invested in movies so I usually hate leaving during a movie and can never fall asleep if one is on. But I couldn't get more than 35 minutes into Dr. Strangelove. I had heard all these great reviews but it just failed to deliver in a big way for the group I was watching with.