Hmm... From what I have, Rotor is definitely the coolest looking set. As far as play value goes, I need to go with Drilldozer or the heroes. Witch Doctor was good, but had an odd leg build... I don't have Scorpio yet, as the price is shooting up on him, but he's definitely one that I'd want. My favorite hero would have to be Nex. I really love the orange color scheme. It seems that the 3.0 colors are a bit brighter than that of the 2.0s. I can't get over the bright orange on Nex 3.0.@Bambi - I would definitely get Witch Doctor if you're a MOCer, as it has so many useful parts. But otherwise, Scorpio is probably pretty good; I don't have him myself, but I'm definitely getting that next. I also need to say Rotor, because he's just that awesome. Fire Lord is good, but has some problems with arm articulation. Von Nebula is kind of short, but overall a nice character. I personally don't suggest Rocka XL, because, as far as play value goes, he has a few flaws; claw pieces fall off way too easily, articulation in arms is meh, pieces on feet fall off pretty easily.