Why would you not like something (or be ashamed about something) just because other people don't like it?
To answer your earlier question, I used to be extremely elitist and extrapolated that if something became immensely popular that it had somehow leaked into "dumb appeal."
Not only that, but the tendency of something completely sidelined and original to try even harder to be amazing, increasing the overall quality. Once something becomes popular and mainstreamed, usually it becomes dumbed down to appeal to an even boarder audience in a never-ending cycle. Or, worse still, the creators of something gone popular no longer feel they need to put forth the effort and thus the franchise/artist/company begins to stink. (Windows, Creative Assembly "look at TW:Empire", et al)
Its similar to sequel syndrome but worse. That being said, this is my biased interpretation of the data.
Tied to this is a idea that a person thinking according to their own will is more intelligent/flexible than a multitude of peoples thinking according to a combined will (due to the simplicity of shared perspectives, since everyone has their own perception of the world, so combined thought always needs more simplification in order to smooth out any differences or objections)
AND I prefer the Republic, where educated representatives rule rather than the combined view of the huddled masses. also, if I had to choose between Aristocracy of Skill or Nobility vs Pure Mass-vote Democracy I would choose Aristocracy because excess in democracy can lead to Charismatic Dictatorship and Mob-rule.
... With all that being said, if I like something I will try to introduce it to other people, because I do enjoy having the same interests as those close to me (don't we all) ... however keeping a clear distance from the "majority." Also, I am presently significantly less elitist.