I have heard nothing good about this movie until this thread. Hopefully we Z people just aren't easily amused.
edit: i just happened upon this:
by Roger Ebert
"Transformers: Revenge of the Fallen" is a horrible experience of unbearable length, briefly punctuated by three or four amusing moments. One of these involves a dog-like robot humping the leg of the heroine. Such are the meager joys. If you want to save yourself the ticket price, go into the kitchen, cue up a male choir singing the music of hell, and get a kid to start banging pots and pans together. Then close your eyes and use your imagination.
The plot is incomprehensible. The dialog of the Autobots, Deceptibots and Otherbots is meaningless word flap. Their accents are Brooklyese, British and hip-hop, as befits a race from the distant stars. Their appearance looks like junkyard throw-up. They are dumb as a rock. They share the film with human characters who are much more interesting, and that is very faint praise indeed.