One other observation I would like to make is that when you get older your choice of music matures... You also begin to realize that some of the contemporary singers can't sing very well and albums are made that promotes singers who aren't really good and cover their voices with background singers or special effects. Music from the 50s to 79 seem to have artist who were brilliant in presenting what music should be. It does happen in modern music but is much more rare than from that time.
I don't know for sure but I would bet that most older audiophiles would tend to prefer jazz singers over other types of genres because of this maturing. It's mostly pure vocals with nice background music.... What do you think am I right or completely off base?