Absolutely no way that any of the HP films are the greatest of all time. To me, I don't HATE the movies but...I'm close. The thing that pisses me off the most would probably be Hermione's hair. I've said this about 23049823048 times before, BUSHY does not, in any language, mean ANGELIC LITTLE RINGLETS. Apparently no one understands that.
Someone said it before, movies are so much worse than books and it's just fact. I haven't seen the LOTR movies but many people would give them a run for their money, cuz they seem to be as great as the books. There's the time issue, esp for GoF (how could they be so stupid as to fit all that into one freakin 2 hour movie) and all the special effects...but God, there are so many things they could have been just a bit less lazy for and made the films at least decent.