Many of our fav characters have shown up in multiple toy lines. What (in your opinion) has been the most impressive & least impressive incarnations of the character? Let's start with the big two: Optimus Prime & Megatron For me, the most impressive version of Optimus is the Masterpiece edition. It is as good as a figure can get. Least impressive would have to go to Energon Prime. I could never really get over the Power Ranger look to him. Megatron is a little tougher. I am really impressed with the current Animated Leader version and would definitely rank this one quite high. Least impressive... hmmm... I need to think on this one for a bit.