As a baby boomer, I grew up with rock and roll and always went "ewww, yech!" to the jazz, swing and big band music my parents grew up with.
Funny thing, about eight years ago I happened to find a station that plays a wide variety of this music, and my aversion flipped to a passion.
Now I listen to it all the time, and have learned to appreciate it.
KMHD radio in Portland, Oregon: here's a link if you want to listen to it yourself through streaming audio on your computer:
http://www.kmhd.org/