^I kinda agree with that. I have never actually done a mix CD for anyone. I just flat out give them the album I think they should listen to. And on a good number of occasions it has worked. A mix CD is interesting in the sense that they can then check the album, which had the songs they liked best I guess. And as some people have mentioned, a single song can do the trick to get you hooked if it just happens to be just the thing they wanna hear. Has worked on me.
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I even made it specifically for non-metalheads in mind.

It's not a best-of or a collection of favourites.... just.. uuuuh... nice songs that came to mind!