Did everyone just come in here to talk about how they don't like the one series that actually held a crazy high level of quality throughout its run?
The Harry Potter films are fantastic and a landmark in filmmaking. They changed cinema. There was no Star Wars this generation, but as with everything else, there was something new. Harry Potter was that, with a little help from Williams of course. That they kept it British, even in face of unknowns in terms of return and pressure early on to Americanize it.
There are no bad films. No IM2 or DAF. No prequels. Hell, there are no pretty good films. They are great. PoA and OotP are the pinnacle, but they are all a good time that hold a strong standard throughout. And a lot of this is do to the talent involved. You could argue they got lucky with the trio, but it didn't hurt they surrounded them with incredible actors and actresses. They amount of acting talent is kinda astounding. There probably hasn't been a better way to learn your craft then from this group.
Columbus brought the series to life with the first two films. His warmer, more kid friendly style captured the style of the first two books perfectly imo. Then Cauron came at the exact right time. His edge moved the series in the exact direction it needed to go from PoA on. He set the tone the rest of the series would need. Newell arguably delivered the most fun and exciting entry with GoF. It is almost crazy to think Yates ended up making half the series, but he did and for the most part did a very good job. OotP is one of my favorite films and the two part finale seemed to deliver in a way that made the vast majority of fans quite happy.
The films are also arguably where the real momentum of the series, more so then even the books. It was the films that paint the picture of the magical world. Look at the theme parks. Emma Watson, Daniel Radcliffe, and Rupert Grint are Hermione, Harry and Ron. It was the popularity of the films that got more and more kids to read.