And if you microwave bread it goes kind of weird and floppy.
Of course, if then microwave it more, it goes kind of crisp, which can be nice.
I'm definitely in the 'Leftover pizza should be reheated' camp. It may not taste as good as it did when first cooked, but it tastes better than it does cold.
Also, if it's leftover pizza, this means I didn't eat it originally so I can't compare anyway.