Transformers was a waste of time. Michael Bay loves explosions (don't we all?) but that's not enough to build a movie around. The times when the movie isn't hurting my ears from the jets, tanks, cars, mechanical things, 100's of explosions and machine gun fire it is just awful. The acting is low-class. There are loads of oddities and a plot does barely exist.
The characters can often become annoying and repetitive. If you are looking for stereotypes you are at the right place.
However, despite it being more of a blob of badly put together clips, it looks pretty. Decepticons, Megatrons and Autobots are amazingly detailed and painstakingly animated to each and every screw.
If you are looking for some pointless action, don't look far. 3,75/10 - Meh of the year.
As for Terminator Salvation I can almost repeat what I said about Transformers, but without the stereotypes and annoying characters.