I've been playing for about 5 years or so (with a large gap of about a year in there where I didn't really play at all). I taught myself music theory out of the Kostka and Payne book and some other sources. I don't tune standard. I come up with my own shapes for everything (scales, chords, arpeggios, etc.) that are frequently different from what others seem to be commonly using. Consequently, it seems like it would be somewhat difficult for me to learn any covers. I also find that I just don't really have any interest in learning someone else's tunes. Anybody else who has never learned a cover? Am I missing out on anything by not learning covers or is my time better spent learning how to develop my own sound?