The most frustrating aspect of the PT is there are some really good moments in there, but are offset by awful moments that take you out of the movie and make it so uneven.

The good:

TPM:
-Darth Maul igniting the duel lightsaber. I always liked the QuiGon/Kenobi/Darth Maul duel.

AOTC:
-Obiwan looking over the clone factory as the Empire music gets louder and louder and he is actually witnessing the birth of the Empire.

-Count Dooku, always been a fan of Christopher Lee. I thought a good scene when he tells Obiwan about the Sith. But freaking Lucas never followed up on this plot point!!!!

-The ending montage of AOTC is pretty good with Anakin taking Padme with his bionic hand, Palpatine looking over his new grand army with the great John Williams score in the backround.

ROTS:
-The opening shot of Anakin/Obiwan flying into this huge space battle is a cool start, and then Lucas ruins it with those lame buzz droids voices.

-John Williams eerie music when Anakin and Padme are looking across Coruscant at each other as Mace & Co. go to arrest Palpatine.

-The Emperor throwing Senate Pods at Yoda, as that fight was much better then the duel on Mustafar.