get to know her but use it to your advantage.
she into pop music? blast death metal
can't live without her cell phone? hide it
those are just examples but be creative :-D
i had a roommate that was the complete opposite of me. total born again christian and she would constantly listen to her christian music... or country. o_O bugged the hell out of me. her side of the room vs. my side were very distinct. she had a big bible poster on our door. i thought about buying a radiohead poster where thom is flipping off the camera and putting it directly across from the bible poster.
because.. i like radiohead and it was the only other place to place a poster. bwahahahah.
i didn't though.
