I left my virginity, my unemployment, and my soul-crushing loneliness back in my 20’s.
My hair.
I’ve only been 30 for 3 weeks, but I’m pretty sure I’ve officially left my clockwork regular menstrual cycle in my 20s. I guess 15-28.5 was a pretty good run but 
But on the positive side, over the past 8 months I’ve lost my 31" waist and found that 27" waist I misplaced in my late 20s. Getting back into shape isn’t nearly as hard as I thought it would be. There’s still work to be done, though.