benighted is a pretty cool song because it was written by a pretty good songwriter. on the other hand it's VERY easy to learn, so it's not a big deal (it took 3-4 days to learn it)... i would be proud in a situation like yours if i got in with an improvisation of mine.
If you think beethoven is not as good as opeth you are a lunatic and quite musically ignorant. I'm not talking about personal preference, I'm talking about in respect to creativity and pure genius. I can't believe you made that comment.