Turning 25 in a couple weeks and I don't really feel good about it.
I know it's not old in the grand scheme of things by any measure, and I'm sure some people will roll their eyes reading this, but for the first time I feel like I can't really interact with the college crowd anymore without being the "old guy." That wouldn't be a huge issue if it wasn't for the fact that I will still live in a college town for one more year.
I think a lot of comes down to context: where you are physically and where you are career-wise and where you are mentally.