Only a small handful of his songs are covers of other songs. But yes, those covers do suck. His music is not about evil stuff. its mostly "shock-rock" meets "be yourself/conformity sucks"
some good stuff can be found in his work occasionally. I love "beautiful people" which is prob one of his most recognizable songs.
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Life's short. Don't waste it on the petty things. Embrace it. Live with a zest. And above all, LIVE.