our household is so weird sometimes because my roommate and I, though we get along fabulously, are Such Incredibly Different People with Such Wildly Incompatible Tastes.
The biggest example of this is our music. I'm weird pop and folk rock: horn lines in mandolin-driven songs, lyrics that vibe but don't make literal sense, lots of gang vocals and random na-na-na lines.
She's top-40 hits and artists with no exceptions. Clean riffs, tight lyrics that say exactly what they want to communicate, usually singular vocals, precisely crafted for maximum listenability.
Each of our music collections annoy the heck out of each other, so the only time we usually have to listen to the other's music is when one of us is showering and playing tunes. Which means she usually doesn't have to hear my newly-discovered "campfire punk elf eco rock" and I don't have to listen to her interchangeable 20-somethings singing about bad boyfriends.
But right now she's showering and blasting Oliviataylorsabrina Grandeliparoan and all I'm saying is that you can have great friends who are wonderful amazing people and they can still make you want to revoke their shower music privileges sometimes.
Shared tastes and interests are not always the foundations of excellent relationships: we should never limit ourselves to only people who enjoy the same things we do -- that will absolutely keep us from being friends with some of the best people we could ever meet.
And also noise-blocking headphones are a great investment.