I still live with my parents. For me, it’s the noise. My room is not that well soundproofed and I will hear whatever is going on in the living room. Whenever somebody turns on the TV (and the volume is not fairly low), all my attention span just disappears. When the outside temperature is reasonable, I can at least open my window and let the noise from the street act as white noise, but otherwise I sometimes just have to stop doing whatever I am doing at the time and go watch some youtube videos/play games on my computer, since I can’t concentrate well enough on most other activities.