Yeah, the neighbor(s)! lol...for me too, KP. My place is on the ground floor in the end unit of some townhouses/apartments. My back sliding glass door opens onto a covered patio about 12 ft by 8 ft. Then there is the back yard, but right at the corner of my little patio/porch, the yard only goes back about 20 feet before turning into a steep downward slope, covered with weeds and wildflowers.
People keep walking through there, mostly walking their dogs (and often off their leashes), and I feel like I live in a fishbowl! It ruins my privacy because they pass so closely by my door, and it startles me every time. Looking in that sliding door, you can see all of my entire apartment because of how it is set up.
I need to have the blinds open during the day so that sunlight comes in - there are only 2 other, smaller windows in my place and they are in a different area. I need the light for my work and to help with depression...wait a minute here, WHY do I feel like I have to EXPLAIN my need for light?! What if I just like it?! lol
Once last summer, I was relaxing in a chair that is in my living room, right beside one half of the sliding door. A big black dog ran right up onto my patio to see me, startling me badly because he was only a foot away from me, on the other side of the glass. I saw the woman who was with the dog, and I opened another door, my side door, to say something to her, and the poor dog tried to run into my apsg because he thought I was glad to.see him!