(BTW, the May 6 must be the American premiere date, here in UK it's releasing on 29th April 2016.)
I like both Cap and Tony because they are both good men. But they both have weaknesses. Right now Tony is driven by his guilt complex over Ultron just as Steve is driven by his compassion for Bucky as well his guilt at letting him "die" in Switzerland.
In TWS the Cap dropped the ball when he chose to go head to head with TWS instead of putting a bullet in his brain. Cap jeopardized the mission, risked the freedom of the whole world in order to treat his old friend with compassion. Wars are not fought with compassion and he's a solider isn't he?
Cap is so self-righteous that he would not see or accept that his behaviour in TWS was not befitting a soldier. And now he goes against his friend Tony who fought shoulder to shoulder with him and laid his life on the line on many occasions? Not done,Captain.
Just to be clear, I am absolutely opposed to the Avengers being made answerable to the "stupida$$" (Nick Fury's word) World Council. So what I am saying is that on principle, I am 100% behind #CaptainAmerica but I don't like that he is also majorly driven by personal reasons.
Having said that, it's absolutely heart-wrenching that my favourite superheroes are fighting each other. But that makes for great cinema, does it not?