Taste matures when expensive stops automatically meaning beautiful.

Early on, price does the judging. Expensive is assumed to be better, and it saves you the work of forming an opinion. Taste starts when you can look at a costly thing and honestly find it charmless, and at a cheap thing and honestly find it lovely, without needing anyone to agree.

Try ranking a handful of things you own by how much you actually like them and see how loosely that correlates with what they cost. The gap is where your real preferences live, and it is usually cheaper than you expect.