I hate to say it (on here especially) but most of the time I see a music review I'll go and listen to it first and then read after if I like it. If I cant find a way to hear it easily its generally not the number of stars or descriptions that help me guage whether i'll like it but the knowledge of the reviewers tastes compared to mine.. and the comparisons to other music.
I do enjoy reading a well written review though, I think it'd be really interesting to do some data mining on the words used to try and describe a song. It seems that as more technology is involved descriptives almost get less abstract and more physical. From things like rich, fluid, lively, melanchony etc to sludge, metallic, cold, liquid.