My friend never got braces growing up. She found out towards the end of high school she would have to get a jaw procedure done eventually (within the next 10 years or so) to keep her from having intense jaw issues when she was older. She opted to wait until after college, which I would have done too. Now she's 24 and working so her time's coming. The bad part is, it involves six months of full braces (NOT Invisalign, full metal braces) then removal and a procedure in which they break your jaw, realign it and wire it shut for a few months afterwards.
I don't blame her for putting this off, haha. She's going to wait another year or two and get the insurance straightened out and then go for it. At least in your mid-late 20s people are not as judgey as they are in college/high school. Braces won't be the worst thing in the world, even though I've said I'm going to call her brace face- lovingly of course. She's just holding out hope that she'll lose weight on the liquid diet she'll be confined to for a few months, lol