There is no such thing as good taste, only taste. That’s what I wrote last week. And actually I believe that is true. It is complicated, though. Let me see if I can make my point.
The idea of good taste to me seems to be based on the ability to discriminate between qualities of music: there is better, and there is worse. This discrimination of quality is everywhere in music: Beethoven is better than Delius, and Henryk Szeryng plays Beethoven’s violin sonatas better than I do. The Beatles are better than Herman’s Hermits; Linda Ronstadt is better than Tammy Wynette. Some evenings I play the mandolin better than other evenings. In tune is better than out of tune. Et cetera.