Lower bounce would be better for Federer, one handers, and smaller players like Nishikori and Ferrer, higher bounce good for the taller players, and two handers. Paris was the highest bouncing I've seen it, and this made it better for the tallest players, big hitters who don't move as well, and made the natural defenders almost impregnable except perhaps on opponents serve or unforced errors. I couldn't believe how some of the second serves especially were kicking up and away and over players heads.
Let's see how the O2 plays this year. It had been medium-slow but relatively lower bouncing until last year, when I thought the bounce looked somewhat higher than it had in the past (but not as high as Paris this year). Of course, each year they can (or do) resurface the court, so they can tinker with the courts as they want.
Respectfully,
masterclass