Yes and no.
I notice my body not being pain-free and strong - which is an age-related disability.
I have memories of that wild feeling of excitement that grips you in your late teens - and I'm astonished to realise that some emotions are hormone-based and I just won't feel them again.
I miss other things: people, places, emotional and social landscapes, which have been swallowed up in time. I miss them as I might miss friends: I know there are great things to take their place - but I still miss them.
I have a strong sense now of time passing and not returning. That's inevitable - and it would be strange not to miss that.
I realise - quite strongly - how much I enjoy being alive, and the things of this world. That goes hand in hand with the above emotion, so the two intertwine in a happy-sad way.
I think the only lesson you can possibly draw is to try and enjoy the time you're in.
My goal at the moment is to try and work within my disability to achieve more of my goals. It's frustrating to experience my body as a barrier.
But then, there's always something, isn't there? Lack of freedom, lack of money, lack of time, responsibilities for others ... it's as though there is always something stopping you from running freely along a road, filled with joy.
Something that really has changed for me recently, though, is my sense of connection to my younger self.
I always felt we were close together. Recently, I've felt as though we were in a crowd, her hand slipped out of mine, and now she's gone. I have to hunt for her in a sea of faces - and I just catch glimpses of her, some distance from me.
I'm not entirely sure that's a bad thing.