I have probably listened to a wider variety of music than you, in fact because no matter what I do people push their music on me assuming I simply haven't heard what I like yet.
Though I have to say, this is not the reason I know of most people "push" music on others. They aren't looking for someone in particular to find something they like, but rather they are looking for someone who likes the same thing they like. Enjoying music is sometimes a difficult activity - there is so much variety that finding someone who likes the music you do is often quite difficult, unless you like solidly mainstream stuff and only that.
Essentially, sharing of music is in many ways a selfish pursuit of someone, anyone, who will validate and reinforce the original sharers opinion. We are compelled to transmit the virus until it finds a new host.
i wholeheartedly agree with you, but i still think that people who don't enjoy music usually don't enjoy it because they never found the right music
much like reading, if someone reads a few books and don't enjoy it they might start to believe they don't enjoy reading, but one can write about everything, and in so many different ways that one is bound to enjoy some way of writing about some subject, be it sports newspapers, internet forums, or crappy fantasy novels
the difference is that to read one must put some effort into it before one knows he enjoys reading what he is reading, and some people are just too lazy
music is something so wide and varied that something you like must be out there... some music might require some effort, especially if it is kind of exotic to you, other might be immediately appealing, possibly because it's exotic to you
music can sometimes be appreciated for the things they are associated to, and sometimes might be appreciated for it's actual musical content: one might like cowboys, and will enjoy listening to american country because it makes him feel cowboy, or listen to something depressive because he is depressed, others might enjoy 80ies dance music simply because he enjoys the rhythms or classical music because he appreciates the compositions, but in truth, one does not *need* to enjoy music, it doesn't make you happier or a better person, so there is no reason to actively search for the right music for you, i'm just saying there is probably something for you out there, though.