Of course not. Who the hell does that? I'd prefer that people I like listen to my kind of music, but what if they don't? I usually know if I like someone before I even know what they listen to.

No, music does not define a person. I know people who are total dicks that listen to the same stuff that I do... so, should I be drawn to them just because they like the Dillinger Escape Plan or Converge? Nah, that's just stupid. Only moronic highschoolers would pull some shit like that.