My brother and dad have almost exactly the same taste in music that I do, so no complaints there, and I share a love for Motown with my mom. When I'm home and playing RATM (which can only be listened to blaring) she immediately shuts it off though.
My GF likes your usual flavour of the day (Lady Gaga, Katy Perry, etc.). I gave up trying to get her to listen to good music almost right away. Tried to convert her to Radiohead starting with Kid A (bad decision, way too weird for her), and thought I'd have more luck with OK Computer. She told me she thought Karma Police was ok but I'm pretty sure that was just to get me to shut up.
MBV is really a love 'em or hate 'em type deal. You might have had some luck if you played Soon though. That song is so addictive.