I found the Baz Lurmann Take of Romeo and Juliet particularly good

one of my favourites.
I do like the Shawshank Redemption, but I wasn't too keen on it the first time I saw it, probably because I'd read the book - I've yet to find a film that lives up to a book (although am looking forward to His Dark Materials coming out next year nevertheless)
Now the book is more of a distant memory, I would rate Shawshank as one of my favourite films.