It seems like a lot of people didn't like Spiderman 3. I finally watched it last night – rented instead of being bought in case it was a stinker.
Spoilers ahead – although the film has been out for a very very long time now, so I don't know why I'm warning you :-)
I can see why it didn't to too well – non - comic-book readers probably don't realise or care how hard it is to be a super-hero (compare the “successful” but trivial Batman films against the not-so-popular but thoughtful Batman Begins ) and bemoan the lack of action; Spiderman fans bemoan the departures from canon and the lack of development of villans.
Yes, there's a little too much “cheese” – super-stylish Peter Parker, Bruce Campbell's maitre'd – and it is longer than it needed to be – but overall it kept moving through the emotional development of Peter Parker at a good pace.
Ultimately the film is about Peter Parker, and not about Spiderman at all. Compared to the previous two films, the balance of plot vs action is different, but the same feel is there.
I liked it. It'll find it's way into my permanent library :-)