I have noticed hesitation in my speech, but it doesn't seem quite like you describe Meemee. (FTR, I'm 48.) I'm more searching for the right word because my mind is 5 places at once. I don't have it very much when I'm writing, but when I'm talking it pops up more.
Physically, I'm not too bad. My eyes started being less flexible a few years ago. I have a slight astigmatism. I think it's always been there, but when I was younger I could compensate for it fine and it didn't bother my vision at all (20/20). As I got older, though, I was less able to compensate and my far vision acuity decreased slightly to more like 20/40. I don't have to have glasses to drive, but it makes things so much sharper so I'm happy to have them now. My near vision is also becoming less sharp, but I don't have to have readers or bifocals yet. I just can't hold things as close to my face as I used to be able to, but I can still read a book at a comfortable distance (more like 18 inches instead of 12).
I have some arthritic type pain with the weather and this fall I've been having really annoying sinus headaches. I do think some stuff like that, including the brain fog, may be diet related. I get more bloating and gas after eating wheat and I think the sinus issues may be dietary, too. I think my digestive system, like my eyes, is less flexible and less able to compensate and just more sensitive now.
I'm trying to get on a regular exercise kick. My DH lost 50 lbs just through exercise and modest dietary changes. He got diagnosed with high blood pressure (which I have had for years, since my early 30s at least) and didn't want to have to take meds, so when his young doctor timidly suggested he could try losing some weight Dh just did it. He's in better shape now than I have ever known him to be. My weight is pretty stable and has been for years, but I could lose a bit.
All right, enough complaining! I've got Thanksgiving to make!