FOTR ~ was the best, as it nicely introduced us to the overall story & principle characters, coupled with the build-up of the Fellowship & subsequent journey of the The Nine from Rivendell and into the Mines of Moria & the drama that befalls them all.
The CGI was dialled down in keeping with the context and pace of the film, which suited me just fine.
TT ~ could have been great, especially building on the foundations of FOTR, but the battle scenes just bored me senseless; Treebeard and the Ents were totally unbelievable (and why use the same actor that played Gimli to voice Treebeard
); and the narrative went right of the window for the sake of adding some pointless "funnies" - such as Legolas skating ffs
ROTK ~ didn't like at all: too many battle scenes again; Frodo whinging and moaning every few minutes; more battle scenes, Sam repeatedly saying "Come on, Mr Frodo. Mr Frodo!".
And the ending that didn't know how to end. I know it was just following the book but the ending in the book seemed "appropriate" somehow; while the ending in the film just dragged it down to a tedious pace and probably should have ended at the moment Aragorn tells the Hobbits "My Friends, you bow to no one!"