Memorable line: “Ecco perchè hai fallito…” (That is why you fail.)
Funny line: “Mangia, mangia, è caldo! Roba buona, eh? Roba buona!” (“Eat, eat. Hot. Good food, hmm?”)
Moving line (considering the context): "Tu eri il prescelto! Era scritto che distruggesti i Sith, non che ti unissi a loro! Dovevi portare equilibrio nella Forza, non lasciarla nelle tenebre! (…) Eri mio fratello Anakin! Ti volevo bene…! (You were the chosen one! It was said that you would destroy the Sith, not join them. You were to bring balance to the force, not leave it in darkness. (…) You were my brother, Anakin. I loved you.)

But really, there are so many good lines I could fill up an entire thread 😄