There have been five movies, four years, four directors, and two Victorias. The actors grown and changed in their acting abilities, whether you like them or not. Their hairstyles have changed significantly, often for the worse. Each film has a unique feel to it entirely apart from the plot.
Which movie was your favorite?
Twilight - the first movie - is far and away my favorite. In some ways, it's the weakest film. Much of the acting is terrible. Rob couldn't decide whether to speak in a British or an American accent. The CGI was laughable. The script was so cheesy that you could easily spend much of the movie laughing at it.
It has a raw energy that none of the other films captured. From watching her other films, I've noticed that Catherine Hardwicke has a distinct style of manic craziness. She really is good at capturing the power of teen emotions on camera. It showed in Twilight. Even with the weakness of the actors and the script, I couldn't help but feel the chemistry between Bella and Edward every second they were together. Her choice of a dark color palate only highlighted the edginess of the film.
However, I think by far the most significant thing Twilight had going for it was the lack of expectations. No one thought it would be a huge hit - not the production studio, the actors, Stephenie Meyer, the director. The low budget hurt the cinematic prettiness of the film, but it was a gift in every other way.
Catherine was very smart to pick largely unknown actors to star in Twilight. As far as I can tell, there was no drama on set, no egos to contend with. The specter of fame did not hang over anyone's head. It looked like the actors were extremely grateful to be there and were having a lot of fun. It's amazing how much that can affect my enjoyment of a movie. Plus, my perception of the characters was not colored by the gossip I'd read about the actors playing them. That especially affected my view of the last film (Interestingly, I never even thought about Rob and Kristen's personal drama. Ashley/Alice irritated me more).
From an objective standpoint, I think the best films of the series were probably Eclipse and Breaking Dawn Part 1. But Twilight is the movie that I will watch over and over.