I use to be able to, um, do that thing with the, um, you know. And I never thought I’d lose that one talent…well, when I remember anything I used to be able to do, I’ll pass it on. 
Only 31, but already deteriorating fast 
I used to be able to remember every name - these days I still don’t know all the names of the people working on the same floor.
I find it more difficult to pick up new things. I noticed that when taking some courses in evening school. I used to have an almost eidetic memory, read something once, know it forever. These days I really have to make an effort to learn (compared to when I was in my teens).
Something I forgot to mention earlier - my tolerance for alcohol has disappeared. It went through a couple of stages. First, I noticed that fermented drinks (wine & beer) made me sleepy, but I could still tolerate distilled spririts pretty well. Then it got to the point where booze would give me a headache at 2 a.m. Now I limit myself to one mixed drink or glass of wine if I want to stay awake. Guess I just killed too many brain cells too early in my life.
Only 24, but (based on my gene pool) I anticipate losing the ability to grow hair on the top of my head. As I understand it, this ability will be replaced, however, with a new ability to grow hair on other body areas (i.e. the butt).
I’ll keep you posted…
SIGH
It’s probably just because I’ve gained some weight, but I can no longer walk on water.
Sua
Well, I turn 30 in November. I have noticed that I generally get aches and pains much more frequently.
When I bend over to pick something up I put my other arm on my knee to support myself.
I have a bit of a belly now. But I think I can work it off… I’m just lazier now.
I thought of two more.
My hearing is going to hell. I used to have hearing like a bat. Now, my favorite phrase is “WHAT?”
Also, I have absolutely no patience.
I find myself ALL THE TIME stopping the middle of sentences because I can’t remember the word for something. Who knew aphasia would be setting in at the age of 32?
One weird thing that I’ve noticed maybe in about the last five years or so is that I can’t remember how I felt about things when I was younger. I can’t really describe this, but I remember a few years ago, I could picture an event from my childhood or teen years, and I could feel the same emotions flooding back. Now it’s more detached, and it’s an odd feeling.
I notice this with my nieces – sometimes when they are upset about something, I get the typical “but you don’t UNDERSTAND” response, and it’s scary that they’re right, I usually don’t understand.
I’m 47 and haven’t really taken very good care of myself. I smoked 2 packs per day for almost 30 years (quit five years ago). Still don’t exercise much. But, I’m pretty healthy, touch wood.
What have I noticed? In addition to the failing near-vision business (which seems inescapable with age), I am finding that my ability to do math is rapidly fading. I have trouble visualizing in 3D any more (eg. those IQ type puzzles where you’re asked what would this object look like from the side). More distressing is the falling off of my calculating ability. I used to be able to multiply three digit numbers and similar stuff in my head. No more.
And, my spelling ability is also shot but I blame that on word processing.
I’m almost 42. My vision, which has always been bad, is better because of LASIK. My hearing, which has always been bad, is still bad. My knees hurt like the dickens (I think from riding). A fall from my horse hurts worse and I’m sore for a couple days. And I find myself with almost no tolerence for poorly behaved children. I never had kids, and other people’s brats make me go from 0-enraged in 60 seconds.
StG
I’m 32 I’m losing the ability to comb my hair. My dexterity’s just fine, but you know…
I can still stay out late, but ten years ago a late night wouldn’t have stopped me from remaining fully functional the next day. Plenty of coffee would fix me right up. But that’s not the case anymore.
I’m also losing my ability to put up with crap. Similarly, my patience is increasing, if that makes any sense. Soon I’m going to evolve into a warrior for good behavior. When I finally start yelling at idiots who talk during movies or plays, I’ll know that I’ve blossomed into a beautiful adult.
Well, Im in my forties & in my twenties I could only surf for two hours, but this year I went
out for more than 6 hours straight. By the time im 60 I want to do 7 hours. I just can’t stay in
for two hours anymore if the surf is nice.
My eyes are little bit off, but I had better than 20/20 at 40 so, Im probably just at around 20/20 now. But
I can’t sleep as long as I used to. I have not had a cold for more than like 2 years
instead of getting them 6 times a year. Not quite a report like those above
At 34, I’ve pretty much lost the ability to get excited about things. There isn’t anything I really look forward to anymore, not even the first snowfall of winter (which nowadays probably won’t even happen, thanks to climate change). I just trudge onward through endless months, waiting for something to happen.
My best friend is the same age as me (50). On both sides of his family is a strong history of dementia. His mother started to suffer in her late fifties. He lives in fear.
Even worse, on his wife’s mother’sl side is a similar history. He is terrified for his two sons.