From a purely musical point of view, I am just so tired of voices like David Cook's. I admit to not having watched anything but snippets of American Idol this year, but from what I can tell, his idea of emotion is more constipation (as opposed to less). "Constipado".
The greats may or may not have sounded strained when they sang, but it was usually when they were STRAINING, not as a matter of course. Listen to Robert Plant or John Lennon or Kurt Cobain, for chrissakes, and at low volume, they don't sound like they're pinching one off. I can't say the same for the average (male) AI contestant.
You can't manufacture desire. You can't manufacture sincerity. You can't manufacture hours in the trenches. You just can't.