Yes it was their presence. They talked about this before, the first time Orochimaru brought Hashirama back and Oonoki mentioned it again when Kabuto brought Madara back. Madara and Hashirama aren't in the same league as other ninjas. Secondly the whole presence thing has been covered too like almost every time Naruto ever used the kyuubi's chakra beginning with his fight with Haku, or when Orochimaru was first introduced. Thirdly, after all the jinchuriki you've seen in action by now you would think you would be used to people destroying stuff with just pure chakra, Naruto has done it before. The rasengan is just chakra, the bijuu-dama is just chakra, the bijuu themselves are just concentrations of chakra. At this point you should just accept that chakra is magic and can do anything. Finally. the 4th was said to be the strongest ninja the leaf village had ever produced, at that time anyway, and there is nothing to dispute that. Madara, Hashirama and Tobirama don't count because the village didn't produce them. They created the village.
It makes sense for the strongest characters to be the most laid back, in addition those 4 have a great deal of confidence in themselves and their strength so that contributes too.
I'm assuming you are trying to contradict what Chaos said but there are a few things you are missing. Firstly, Sasuke and Itachi are Uchiha, they have emo genes as someone phrased it in the last chapter's thread so they don't count. Secondly, Gaara and Neji were two extremely traumatized kids from 2 epicly dysfuctional famalies, seriously only the Uchiha top them. Lastly, most of the bad guys were power hungry which is the reason they were bad guys in the first place, power hungry people aren't known for being laid back.