While I liked Transformers(yes, all of them), I do prefer my movies to have some substance to their style. At least, when the material calls for it. When your film is based on a cartoon about two factions of giant robots having a war on Earth, you really don't NEED much substance. However, Jurassic Park would because it can have several different messages: a message that nature should not be tampered with, that nature cannot be contained and controlled, or that genetic engineering brings nothing but danger. The only directors I know that can still find that balance between style and substance are Steven Spielberg(leave Indy 5 alone people, it was just as silly as, if not more so than, Temple of Doom) and J.J. Abrams.
"Geez, we've been back together for five minutes Doc, and you're already talking about the end of the universe."
"Stupid, stupid rat creatures!"