So F.C.P.R.E.M.I.X. is the fastest and hardest song I know how to play, it's by The Fall of Troy, and just has some fast paced guitar parts, no shredding or anything, personally I don't feel like shredding determines a good guitarist or not. But my question is, does playing that song determine a good skill level? Or is it not "hard enough" for some of you.