Turned 36 day before. Not so long ago, those in their "forties" were "senior" folks :D Well, its knocking at the doors!
Seriously, the midlife has come with all the accompanying confusion, clarity, freedom, anxiety all at once. Feel healthier than a few years ago - probably due to cycling and lack of the 9-5 stress, have a larger 'zoomed out' view of many things, and yet there's a tinge of ennui.
Looking ahead to the next dozen :)