By far the best scene for me was the sequence leading up to, and including the race scene between Barricade and Bumblebee. For me, it was really authentic and reminiscent of the original movie when hot rod (?) throws up spike and encloses the car around him and drives off. The camera angles were great, the chases scene was great, when bumblebee protected sam and transformed right in front of barricade, all very authentic and well done scenes imo.
- as a side point, bumblebee shooting that transformers light into the clouds to signal was horrendously bad. This isn't thundercats or batman, simply horrible.
Worst scene - either when the autobots are at sam's house, or one of the melodramatic points "You're a soldier now son!!!" or when sam and that chick get up off the ground with the amazing lighting effects and slow-mo, that was horrible.