I'm approaching 40 and I've noticed in the past few years....
- Can't keep weight off just by exercising. I actually have to watch what I eat, especially after 8pm.
- I dread staying up late socially, but I'm ok staying up to binge watch.
- My night vision is getting worse.
- I actually care about what kind of mattress I sleep on.
- More people annoy the crap out of me, generally speaking, and I now see that most stereotypes exist for a reason. When people bitch about millenials being lazy, sheltered pieces of crap - that's because it's definitely true.
- I give way fewer shits about what other people think. I've basically become Larry David, and it's actually pretty fun.