I've seen a number of beer/music analogies, but mine includes wine and spirits:
-Wine is classical music. Elegant, intricate and carefully-crafted. The culture and the products themselves can be somewhat inaccessible to the uninitiated.
-Spirits can all be lumped together as 'Tom Waits'. Relatively narrow but massively deep. If you can get past the burning, there's a wealth of treasure underneath.
-Industrial light lager is the Top 40. Very well-produced, but designed to appeal to the widest possible consumer base.
-Craft beer is everything else, and not just within the confines of western music. Some is truly good, some is truly bad, and a lot is simply misunderstood. Regardless, the variety is staggering. If you want honest expression, craft beer can touch your soul. If you're a pretentious snob, craft beer has a scene for you to own. If you like it heavy, light, loud, quiet, fast or slow - craft beer does it all.
This list begs the question "what is craft beer?" I'm not going to answer that.