I was a lot more hypervigilant about 7-10 years ago. I don't seem to experience much in the way of it now though. I also don't seem to dissociate as much as I used to. I think PTSD can fade after some time for some people, though that doesn't mean there isn't the chance that it won't come back at other times, when triggered. I just seem to be having a good run at the moment with not experiencing many regular symptoms.
I do make sure my bedroom door to outside is locked at all times, even though it can't really be seen from the backyard by anyone snooping around. I still keep it locked during the day and night. If I hear a funny sound outside at night, I get spooked, but it doesn't have the same kind of quality to it as when I used to get hypervigilant, and I can fall asleep after not too long again.
There was a weird crashing sound at the door the other night, which really sounded like someone banging on the door, but I remained calm and rationally thought of what to do, instead of jumping up and grabbing my big stick I keep int he corner. I just didn't answer the door, or look out the window, and basically ignored it and decided it was nothing...which it turned out to be.
I get startled if I run into someone after opening a door, but it is normal startled, not hypervigilant startling. I do tend to remain on alert but in a relaxed way I like to be ready for anything. I'm not sure if this is just my martial arts training, coupled with knowing that anything can happen at any time, so it's best to be aware and ready for action. Not sure if that counts as hypervigilant, but if it is, I think it's not a bad thing to be that way.
I did lose my pepper spray hello kitty key chain a few weeks back and I'm kinda missing it. I want to order a new one off e-bay. I liked having it there as a security in case. But I don't get too worried travelling on my own without it now. I think about it now and then though. It always felt better to walk home at night with my finger on the trigger just in case someone grabbed me. Better to be a little paranoid than not alert at all and be taken.
I don't even keep a knife under my pillow any more. I'm not sure if this means I am less hypervigilant, or more apathetic and careless?