Fave scene in any of the SW movies. . . I'd have to go with the big three-fold battle royale in Jedi. It just had this awesome sense of finality; decades of struggle, effort, and heroism were all coming to a head. It was Epic storytelling at its best.
From the novels, my favourite scene has to be the big duel at the end of The Last Command, the first time Luke & Mara fought side-by-side.
I also like everything in Courtship of Princess Leia, just because there're so many great "visuals" (like the group crossing the lake on rancor-back).
"Don't f_ck with the Jedi Master, son." --Mark Hamill