Focused too much on making a living in my teens and 20s instead of college and social life. Never pursued artistic interests seriously because I was just too tired from working and stressing out about bills. Now I’m in my 30s with next to no social life and the realization that I’ve wasted away my time and whatever little talent I have. There’s a “regret” folder sitting in my Google Drive with two half-finished books…
Would some things have gone better if I'd done that with my 20's instead of my 30's? Undoubtedly. At the same time, other things made it much easier in my 30's -- for an obvious example, having money already saved up freed me from having to work some menial job to support myself during those years.
It's definitely not too late.