After seeing Revenge of the Fallen a couple of times now, I have to say that I am really enjoying the fact that the Decepticons have a really good motivation and are presented in as sympathetic of a light as possible given their plans. While, I think the writing is god-awful for the most part, they've really done a good job fleshing out the Decepticons. The Decepticons are trying to prevent the extinction of their race. Now, in this scenario, I'm not talking about the Fallen. He seems like a pretty boilerplate bad guy. I don't really see anything compelling about him, TBH. Megatron on the other hand seems to have a lot of depth in this one. There's the argument going around that the Autobots and the humans are a little overzealous in their Decepticon hunting as evidenced by the calculated hunt and deactivation of Demolishor and Sideways. I have to say that I somewhat agree with this. Megatron's primary motivation it seems is to prevent the extinction of the Transformers. While it's true that he thinks nothing of humans and takes pleasure in their suffering, I can't say that I'd have a very good opinion of them either given the scenario that took place. That is, they imprisoned him for so long, and who knows what else they did to him during that time. Megatron had done nothing to them up until that point. Keeping that in mind, I would certainly side with Megatron over the vileness of the human race (if I were not human). He doesn't just succumb to a blind bloodlust, either. He expresses remorse at losing the cube, loyalty to the Fallen, conviction for making things right (for the Decepticons at least), fear at the possibility of his own demise and outright sorrow when the Fallen is defeated. I thought that they really made an effort to present a more complex Megatron than what was necessary. Since the rest of the writing in the movie is so lackluster, it's a little surprising to me that they gave as much thought to Megatron's character as they did.