Replying to Sleep...how much?

7.25 hours is my dead on cycle, and I go 4 hours if I can't get that much, feels better than 5 or 6 (cause you ordinarily have 2 deep REM cycles per full sleep). I have a plethora of energy all the time though, and can go 4 hours for 3 nights in a row and still decently function. After a big ski day though 8 hours helps me recover better if I wanna shred all day again. What's YOUR full sleep time? What do you usually actually get?