Even provided it wasn't normal, how any person engages with art is up to them and it doesn't require someone else's approval. No need for your tastes to be normal.

And as Nabokov used to point out, a good reader, that is an active and creative reader is a rereader. Same goes for music. Many incredibly talented people spend their entire lives studying and playing a handful or maybe only even one composer, so why shouldn't listeners do the same.