There are times when I, too, feel like a wavy imposter and times when I feel like a true CG. When I was about 14 I had Shirley Temple ringlets.
I used BedHead TIGI ControlFreak back then and I only used a quarter-size amount of it. As I got older I developed PCOS and my hair became moody. It adjusts itself according to my hormones. I always had a small area of straight hair in the back of my head underneath the top canopy, but in the last year I've noticed more straight hair cropping up.
Also, the curl on top has grown progressively looser.