The poll is kind of flawed for me since I typically get 7 to 8 hours of sleep....which overlaps two of the options.
If I get less than 7 hours of sleep, I feel like my brain doesn't function properly. I can't think as clearly and as well. 8 is ideal as I feel normal and rested with that. If I slept more than 10 hours, I would feel groggy.
Monday through Friday, I get at least 7 hours of sleep. Sometimes less if I'm working on stuff and have no choice but to stay up later. On the weekend, I almost always get at least 8 hours. If I stay up really late, I'll just sleep later to get the full 8 hours. Unlike many other people, I thankfully wake up based on when I get my full 8 hours of sleep, not the time of day.