I do this with music, because I HATE instrumental passages with the hate of a thousand burning suns, but I can usually tell when someone is really good at it. I just don't LIKE it. It could be amazing and powerful and virtuosity embodied, and I won't LIKE it and will kill it from my iPod in a new york second -- I can also tell when someone is crappy at singing, but if I like the song, and this is the only version I can get, I will keep it. And play it.