I really enjoyed it and gave it an 8. I can sympathize with some of the woodness of the characters, though. Mediocre writing and poor delivery make for some seriously painful dialogue, and neither Christensen or Portman can get it quite right when they're together. McGregor is easily my favorite actor in the movie. He and Christensen complement each other well, and when one of them delivers a line poorly the other helps out. Also, as little as I like Christensen's acting, he definitely gets the most improved award. I could sense much more of his character's conflict: with the jedi and palpatine, with Obi-Wan, with Padme, even with himself. Most importantly, the visuals were gorgeous: the space battles, the duels, everything. I liked the speed of the lightsabers. I could feel and see Anakin's fury, and that's all I needed. Also, Palpatine is an incredible villian, and though we don't see the full effect until this movie, his scheming and plotting puts him right in my Top 5, as far as I'm concerned.
I consider myself a big Star Wars fan, but grievances I have with this movie I could probably pinpoint in any one of the original trilogy. They're campy sci-fi movies with mediocre acting and bad writing. But the special effects have always been gorgeous, and the grand scheme of the movies has always been stellar. Underneath the campiness is a good story, perhaps a little obscured, but by no means buried.