A lot obviously depends on taste.And taste is mostly a function of education.You tend to like the music you grew up with. But then, I do think that there are some objective parameters to judge the real quality of music, and I have clashed dramatically with people who think that there is no way to put objectivity and reason into art.
Despite the risk of being considered a technocrat, I will write down some of these ideas now. I'm not a music scholar, and I'm not the owner of all truth in this world, so don't take the following as an absolute thing.
Take it just as a simple, very incomplete set of ideas and basic facts, put together by yours truly, in a vain attempt to explain why I like some music and not another.
Over the years, I have had many discussions, and even some fights, centered on objective and subjective quality in music. Usually, these fights get started when I complain about my neighbor listening to rock, cumbias, techno, or such at a volume level that forces me to 'enjoy' it too.These discussions have not been a total waste of time. They have led my neighbors, my friends, and me to think about why we like one kind of music, dislike another, and feel indifferent to a third.
There is another guy who spoke Spanish, I guess, or Portuguese. He too is in my top 3. As I am a lover of music, and although we are not God, but a near point of desire should be on everything you put your mind on without looking at the prize to be won.