I read MN for many years. I've never really asked any questions myself, but from reading posts from others I've learned some things that helped me in real life. My specific examples are
- lovebombing is something I'd never of. However, reading here I saw so many threads, got a good picture of it, and it did help me in alerting me to something.
- fertility and related challenges are a big deal for some people. Reading through the related forums it helped seeing stories, challenges, advice from others
Of course there is a lot of fun/amusing posts too, but it's been useful to me in a much more serious way