The original Star Wars trilogy, especially 'The Return of the Jedi'. I know it inside out, and I've probably watched it a thousand times since the first time, which was when I was about 6 or 7...it's classic.
Also, 'The Lion King'. It's the one and only movie that has ever made me cry, and I just can't get sick of it.
'Ten Things I Hate About You'...because I can identify. Seems like most people think of me the way the people in the movie think of Kat. I think I'm quite a lot like her, especially when it comes to complaining about things involving school...
'The Brothers Lionheart'. The movie based on Astrid Lindgren's book. Jonatan was sooooo cool and sexy, and Katla was the scariest monster ever. Ignore the now laughable special effects, this movie is pure magic!
And most important of them all; 'The Quest for the Holy Grail'. Well, do I need to say more? It's Monty Python, it's real humor, it's Knights, it's hilarious, and the jokes do not get old no matter how many times you hear them (well, apart from the unladen swallow one, obviously
)
And sorry for long post...