Wow. I'd hate to be at your school. I vaugely remember you saying something like your life was "ruined at the tender age of..."...I can't remember the age you said. But still, no wonder you're so insecure about that stuff.
If they ever prodded and insulted me like that, I just wouldn't say anything about what I like. I'm STILL a bit cautious, but not as much anymore.
If they don't like me for what I like, THEY'RE the ones with the problem, not me, and that's their own problem. Then again, I pretty secure. Luckily I'm quieter, so I usually keep my mouth shut in the first place. When people ask me questions about what I like, I'm VERY, VERY vague.
Music? I dunno, really.
TV show? (Now THAT I'm open to, since most people like the shows I like.) Simpson's, Friends, SNL...(I have more, but those are the most popular, so I don't say anything more.
Movie?: Wow. Too many to choose from. ...Probably Austin Powers 3: Goldmember. (once again, another popular thing)
Video Games? Mostly Action/Adventure.
...And I leave it at that. They usually don't pry too much. That, and I don't have a hard time saying "no" to people.
Usually, I only make VERY subtle hints about what I like or believe in. Once I realize someone else has the same interest (usually by them--and only them--picking up on these hints), it is then that I speak up openly.
While I care what people think about me, if they're an idiot, their opinion is invalid. If they don't like something I like, that's still not gonna stop me from liking it.
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Deep inside us all is a little green elf telling us to burn things.