Eleven years later, I'm 3/4 of the way done with that Novel No One But Me Will Ever Read, in which two of the characters are obsessed with Sunny Day Real Estate. In the course of working on that novel, I listened to Sunny Day's albums umpteen-million times, and this very strange thing happened. I sort of, kind of like them now. Sssshhh...don't tell Michael.
In my opinion (and I held this opinion even before I started to like their music), if you are in any way a serious lover of music, you should at least know who Sunny Day Real Estate is. They are a band's band - the type of band that failed commercially but managed to have a major impact on today's music. As one example - here's Hayley Williams from Paramore giving a tribute to the band. Two members of Sunny Day also went on to become part of the Foo Fighters.