Wow! The St. Joseph post was a milestone (#100) and I didn't even know it till I signed in and saw it on my dashboard. What fun. So, to add to the coincidence, the second "century" of posts begins with the second decade of my life -- today I am twenty!
And if you have to know, no, I don't feel any different... :)
So what have I done in two decades? I've grown up in an awesome family, watching it grow (biennially) from two to eleven kids; I've learned a good deal (though not nearly enough) about music and know that it'll be a lifelong study that will never cease to amaze me at every turn; I've never had a boyfriend or been on a date, and I don't care; I've made many friends and (as far as I know) no enemies; I've wept a good deal and laughed a good deal more. And of course, I've grown in the Faith the whole time and learned to love God... not enough, of course, but I try.
In short, it's been an awesome twenty years and I can't wait for the next twenty. Thank God for the former and may He grant the latter!