Maybe I was too harsh in my last comment. There are many fine musicians who don't write their own material. What I get pissed with are people who copy a complete arrangement, even down to licks, phrasing and vocal accents. Sometimes to emulate a style or a particular performer is interesting but an entire performance copied from other performers is not art - it's akin to photo copying or plagiarism. If all you do is copy I can't see how you are musician!

Mike