The understanding gets built over time and the breadth of experience also helps cancel out the individual changes per recording. An earphone that's bassy with one song doesn't mean the earphone is bassy. It could just be the song. An earphone that's bassy with 100 songs is a bassy earphone.
True, it will take a while to get to this way of thinking, new users have a long glorious road ahead of them though.
I miss the days I didn't worry about the small things..now I worry about everything.