See Pope get angry after person in crowd in Mexico causes him to almost fall. (Click on 2nd picture down.)
I can't say I blame the dude for being pissed off, but being pontifex of a large millenia-old cult, there should be an expectation of confrontations with zealous followers in their irrational adulation.
Yeah, I don't see why anyone would want to go above the rank of cardinal, myself. The pope doesn't really have any more power. He's mostly just a figurehead, nowadays. The folks from the College of Cardinals are always running around behind the current guy, explaining what he meant and that what he said doesn't represent an actual change in church doctrine.
He's a glorified (literally) spin-doctor.