I don't have AvPD, but I've been like that my entire life.

It started around 4th grade, I think, had a boombox with radio and cassette player/recorder. I would record music from the radio onto cassette tapes and then listen to the cassette tapes over and over for hours, usually while pacing in circles in my room.

Throughout pretty much my entire teen years I was known for always having a pair of big headphones on my head, I never went anywhere without them. When not around others, I would just walk/pace and listen to music while daydreaming.

Continued onward into adulthood. Still to this day I spend on average 1-3 hours almost every night listening to music and daydreaming.

I identify a lot with what I have read about Schizoid Personality Disorder in regards to their "secret inner world" and the concept of preferring fantasy worlds, stories, friends and experiences, as well as having inner emotional attachments and experiences with those fantasies - yet having a very hard time feeling engaged in the real world or forming real life attachments.

There are some "characters" and worlds in my mind that have been with me for over a decade at this point, and I am always looking for new inspiring material to absorb into my world. My inner world is like an inner universe that is ever-expanding and fleshing out.

If I watch a show, it's not to enjoy the show, but rather to harvest material that I like from the show. Characters, places, concepts, etc. Typically the same with movies, anime, books, artwork, etc. My "crushes" in high school gave me no desire to even talk to whoever I was "crushing" on. I just wanted to absorb them into my mind, and then I would have long, intense romances with their carbon copy and enjoy it as though it were real.

I'm not sure if anything else about SPD applies to me, but I sure do relate to that aspect.