because i don't hear particularly well, my musical taste leans in three directions: the music of my teenage years, metal, played at volumes that deafen people with normal hearing electronica/trance, played at volumes, etc. etc. classical music, baroque in particular, played… okay, you get the idea.... i picked up this habit in college, when the sheer amount of books i had to read and papers i had to write (a novel a night, pretty much), would overload my brain if i had to also try to parse lyrics at the same time.... i didn't ever think much of this until a few years ago, when i completely misheard a coworker's sentence, much to my embarrassment, and promptly saw an audiologist and an otolaryngologist, and was diagnosed with central auditory processing disorder, which is technically a learning disabilty.