I reckon taste in music is similar to taste in food: it largely depends on what you grew up with, the time when you grew up, the place where you grew up, how open you are to trying new things, where you ended up going later in life, the opportunities you got, and ultimately the shape of your taste buds. We all end up with blind spots, and that's perfectly OK.
I'd like to know more about jazz and classical, for example, but on the other hand I've been to the opera and it's still as closed a book to me as is kabuki theatre. You can't say any one art form's better than any other - not that anyone here has been saying that - because that's all it is: taste. Well actually you could, but you'd need very good, watertight arguments to back it up.
But even within the genres you're familiar with, I bet anyone here could name loads of artists who leave them cold, even though they're loved by people who's taste and opinions they otherwise respect. However, arguing the toss about that is half the fun of it.