Nuff said.
Seriously though, Megatron needed more screen time, just like the other Decepticons and Autobots. The CGI was top notch and the action set pieces were great, if a little too Matrix like for my tastes and the robot designs too manga-ish for my tastes.
What kills me though is that this film was budgeted at $150 million, unlike last year's July release Superman Returns with its plus $200 million budget, and Transformers has already made back more domestically in like two-three weeks than SR did in its entire domestic run.
Here's hoping that when they try yet another He-Man or do GI Joe, they'll do 'em right.