Would you all say that the Raimi Spider-Man movies get more topics and go through more scrutiny than any other movie series, save for maybe Star Wars, here on GAF? I find it all to be very interesting.
That said, Spider-Man 1 and 2 are fucking amazing. They are the most "comic book-y" comic book movies you'll ever see. The characterizations are impeccable. The way that the cops are all idiots and all of the main characters don't quite act or speak like people actually would in those situations. They all ham it up, but never go over the top. The music is perfect. The editing is fantastic. I could go on all day.
The reason why Spider-Man 3 sucked so bad has nothing to do with the multiple villains. It's mostly because they messed up the characterizations that were so perfect in Spider-Man 1 and 2. Spidey 3 started off well, but the way the characters started acting was more akin to how the characters acted in Batman and Robin. Way too over-the-top. They stopped being the characters we had come to know in 1 and 2, and they turned into jokes of themselves. Elfman was also sorely missed. Some of the music in 3 really, really sucked. Again, I could compare a lot of the music in Spider-Man 3 to stuff that I heard in Batman and Robin.