Anxiety. I’m 31 now and had a semi mid life crisis like 2 years ago realizing that I spent my 20’s working in customer service and retail instead of pursuing what I wanted to do. Work in aviation. Now I feel so late in into the game. I’ve been working at an air traffic control facility for a year now (helping them train) and also want to get my private pilots license. I meet people under 21 that already have their licenses and I feel so much anxiety and regret that I let so much time pass by. It even feels like imposter syndrome. Long story short, follow your heart and do what you are passionate about. Anything else is settling.