Personally I think Thriller is over rated... but the video is freakin' amazing.
Otherwise, I gotta' say "The Way You Make Me Feel", "Man In The Mirror", "Do You Remember" and "Black or White."
I won't go on the defense and claim Mikey's innocent, but it does sadden me that he's getting the press he's gotten. He's just so... talented, and it really sucks to see his legacy become what it has. I was a HUGE Michael fan back in the 80's, I even still own the game "Moonwalker"!