I've been watching some of the Australian Open matches the last few days, and I can't help but notice the differences in the old guard and the newer players.
Though it's not universal for either, it seems as if the newer players (Monfils, Tsonga, Murray etc) are always reacting to results good or bad, whether they hit a good shot or bad shot. It doesn't matter. They have no patience for their opponent actually hitting a winner, or in fact losing a point.
This was most clear to me watching two matches; Murray/Verdasco, and Blake/Tsonga. With Tsonga, if he lost a point he was seen to be whining and angry at having lost the point. It didn't matter whether he lost on a winner from Blake, or from an unforced error off his racquet. Each point was an emotional high or low. Even when he lost a point off an amazing shot, or series of shots from Blake, Tsonga acted as if it was the end of the world. He was celebrating every point won, even if it was an error off Blake's racquet.
Murray doesn't do as much celebrating as Tsonga, but he matches him in the whining department and then some. Yelling at himself or his coach when things don't go his way.
These guys are basically spoiled brats.
From my perspective there is just no reason for any of these histrionics. I have no problem with players celebrating good shots when they hit them, or momentous points in a match. Or getting on themselves when the hit a poor shot, or make a bad decision. Emotions are a part of tennis. But I think these guys go too far. Too many highs, and too many lows. They are all over the map emotionally, and it's tiring just watching them.