I thought Episode III was cool-admittedly I wasn't in the best state mentally and physically when I saw it, so hopefully when I see it again I'll enjoy it more.
I have to say though, I found the Emperor to be more like a pantomime villain this time around-that 'No! No! No!' bit during his fight with Mace had me wincing. Not to say that McDiarmid was all bad or anything, just that a lot of the time I personally found him more cartoonish than evil.
Love the way he seduces Anakin though:
Anakin: "So you're the evil bugger what's been doing the bad stuff then?"
Empy: "Yup. Don't tell on us-be yer best mate, promise."
Anakin: "But I'm conflicted-you've been so nice to me...but NO! I must dob you in."
Empy:"Erm...Dark Side! Powers! Save your wife-teach you how, I will!"
Anakin: "How? How do I save my beloved Padme? She's not irritating, like what sand is..."
Empy: "Well, not choking the **** out of her would be a good start..."
Anakin: "Beg pard?"
Empy: "Nowt son."
Anakin: "Anyway-NO! I'm a Jedi, and must uphold Jedi values. Despite you being a non-threatening and quite nice old chap, I shall not display my usual patented brand of extreme arrogance, even though I'm the most skilldest Jedi evah, and beat you into submission and frog march you to the Jedi Council. Nope-instead I shall leave, grass you up and hope you don't scarper in the mean time."
Empy: "Fair enough son. You drive safe. Want a Worthers Original before you go?"
Anakin: "Please. They're cool and creamy-unlike sand, which is hot and irritating."
Empy: "You run along then, my little orphan Annie-see you in a bit when you decide to betray everything you believe in based on the word of someone who's just admitted to being the single most evil and manipulative person in the galaxy."
Anakin: "Awesome. Laters!"
Piss-taking aside, I did enjoy it. I thought the final scene between Anakin and Obi-Wan was fantastic-genuinely got a little choked when watching it.
Looking forwards to seeing it again.