Some creatures have more mythical powers...If they kill Jamie Lannister...raise him, hes just a normal man. Dani..Jon...Dragons...Bran...they're different beasts.To be fair, I just always assumed he can ride a dragon because the dragon is a zombie and doesn't hold any former knowledge of what the criteria is. He controls the dead, they are dead. Hell, he could control a stark, a wildling or whoever, doesn't mean they like him.
I figured him walking through fire was part of his magic.
Not saying they can't be factors, I'm just saying it could also be at face value he's riding a zombie he controls. Period.
As for bran, yeah, that's a big one.
What's his connection to Jon? None has ever been established as far as I remember.
But yes, I suppose it could all mean nothing.
Didnt he let Jon live at one point when he could have killed him? He also has these constant staredowns with him, I think theres more to it than “you just my enemy”.