With Megatron, I just can't get over the whole, "But look, the Decepticons were rebelling against an unjust system! They have a good goal! Their intentions are good, they're just a little misguided!" Because a) that doesn't justify the path they've taken and b) I see no clue that Megatron's pasted-on backstory has informed his present-day characterization at all.

Muppet Treasure Island is a brilliant movie. I need to watch it again.