First of all I'm a big fan of the films, but have had a few issues with bits here and there.
Nobody can ever persuade me that Aragorn bitch-slapping a whole bunch of ringwraiths at weathertop does anything but turn the RWs into comical sidekick characters. Every time they show up, they get their arses handed to them on a plate, often by opponents they should realy be able to eat for breakfast. But never mind, most people don't seem to notice, so I suppose it's not a major problem, but weathertop irritated me.
In TTT I was annoyed at the length of the ARwen interlude, but some of you here have made some very valid points as to why this was necessery in the film, and you've changed my mind. Fair enough, the Arwen/Aragorn/Elrond relationship did need establishing more firmly and that was a good way to do it. Likewise with faramir, although the ringwraith getting smacked down by a single arrow was daft.
However whatever little niggles I might have here and there, PJ won me over permanently with his portrayal of one character - Golum. That was some of the best character development I have ever seen in a film, and is just all the more amazing that it was a CG character.
Simon Hibbs