alt Hacker NewsTaste absolutely can and does evolve the more you play. It doesn't mean that everyone taste evolves towards one absolute taste, people stay different.
I kinda think it applies to all artistic hobbies. On one hand you learn a practical hands-applying skill, on another hand you learn how to express yourself and/or listen to expression of others in chosen medium. And, well, the more you look at something, the more you see. The more you see, the more you know your own preferences.
What's even more funny, the "detail perception" skill doesn't always sync to your guitar skill. So (for me at least) there are times when I'm thinking I'm the hottest stuff around (because I just mastered something I deemed important), and there are times when I'm down because my detail perception suddenly got better and turns out I would prefer to play with more nuance (but didn't learn how to yet)
I can attest. After 7 years of practising guitar, the gap between my ability and my taste is even greater compared to when I started.
Actually I can say the same thing for programming, I can build most software I would think of building when I started 20 years ago, but there is still a large gap between what I can build but what I discovered later and now would like to be able to build (I'd need to learn lots of maths in addition to other things).