The best scenes in the movies IMHO. But then, all these blogs are my opinion.
The best saber duel: It would have to be the one between Maul, Qui-Gon Jinn, and Obi-Wan Kenobi. The sword-play was excellent.
The saddest scene: The execution of Order 66. Anakin killing the Jedi, and the Clone Troopers turning on them. :'( Enough said.
The funniest scene: The scene where Yoda first meets Luke. "Found someone you have, yes." LOL! Funny stuff.

*
The most emotional scene: The fight between Obi-Wan and Anakin. Padawan gone bad and master.
There are the best scenes.
*The funniest moment, however, I would say is where the stormtrooper hits his head against the top of the door

I laugh everytime.
