Best; Forbidden Xmen3, Up, The Time Traveler's Wife, Night at the Museum, Terminator 3 not bad, could have been better : G.I. Joe: The Rise of Cobra, Worst movies; Harry Potter, Transformer 2, Diary of Mad Black Woman, The Final Destination, Whiteout.
I think the best was Avatar, that was a great movie and blew me away. The worst was New Moon. I was pretty much dragged to the theater to see this; I left after the first 30-40 minutes because I couldn't take anymore bad acting and horrendous script.
I think Slumdog millionaire is the best movie of the year. and i dont think there is any movie is worst.