On this, I completely disagree.
We all loved Hart's passion. Of course we did. It was obviously from all his shouting that he cared.
But that's not leading. That's cheer-leading.
Hart was no different than Rooney. Shouting "C'mon" and bollocking players does not make you a leader.
Hart was a shambles at this. He literally screamed Boateng, Savic and Mangala out of the club. All 3 are now proven to be very decent centre halves. If Hart was a leader, he'd be constantly moving them into the right positions and motivating them. Completely different approach to what he does.
But yes, from the stands we all love to see the vocals and verbals.
If you want a great example of leadership done right, look a Demichelis when Kompany went out injured(yes, that demichelis). But there was a time when he came into the side and made a huge difference by being a calming influence, experienced enough to ignore Joe's shouting and screaming and was able to calmly organise those around him. It was great leadership without being a shouter and a screamer. Of course, you have to practise what you preach and poor Martin wasn't good enough quality to be in the side by the following year, but it's another story for another day. But in his first year, he was very clearly a respected leader and had a better leadership effect than Vinny, who is great in his own game but not an organiser of men in the same way.