First of all Bane is HUGE and probably one of the only people who physically could take on Batman (In the batman universe) purely on strength. Next up we got the fact that unlike most the other villains I feel like Bane is probably the only one who would actually truly kill Batman. I mean Joker could never do in Batman they are ying and yang one is nothing without the other. Yet with Bane he doesn't need Batman he just wants to break him ( emotionally and physically ) and doesn't care about any of the consequences! That is one bad ass villain if you ask me.
Finally Bane has such a crazy origin story and that alone to me helps fuel his crazy villain image. I mean he was born in a prison and had to serve his father's sentence! What sort of child could survive such a situation.
Also Tom Hardy as Bane acting that well when he can't even use facial expressions is just amazing.
Anyways come tell me why I'm wrong and why you are right below.