Generally yes they are good naturedd- you will always get the odd rock ape wherever you are
As for atmosphere it depends- in southern Europe the audiences tend to be crazier than in northern Europe (although Amsterdam was the exception to that)
I'm curious to see how it plays in london
unless you're short and stuck right at the back.
As far as I can see from photos there are no screens that follow the band around - the only screen is the big one in the middle which will often show effects?