We used to have in Seattle one block with four really good audio stores. You literally could walk across the street from one to another. When a co-worker said he was serious about learning we went and in no time flat heard a dozen to 20 different speakers and systems. We played the same few tracks. He caught on real quick how awesome trombone was on one, guitar on another, human voice, electric bass, etc.
This guy was an absolute noob. Never done anything like this before. Yet he caught on real quick.
Its the next step, what you do with that knowledge, where things get tricky. When something sounds selectively good like this its always for one of two reasons: sins of commission, or sins of omission. It may sound good with classical because the bass is poor so they dialed it down helping the strings sound clean and clear. Sins of omission. Or it may sound great with rock because they dialed up the bass so you don't notice the harsh grainy treble. Sins of commission.
Either way, what usually happens in the long run is we are all sinners and we all love to sin, and usually as much and for as long as we can. But sinning eventually catches up with us all. In the long run the less, the better.