Gryffindor: claims they get NO sleep but really falls asleep at 11:00 or so and doesn't think mornings are as bad as people think (unless it's a Monday)

Ravenclaw: staying up until 12:00 then going to sleep watching a TV show or reading a book. Proceeding to be the worst person in the morning, will fight you

Hufflepuff: up until 5:00 AM and claims they're not tired then, but then the next day they're the grumpiest you've ever seen them (they need their coffee/tea)

Slytherin: up until as late as they can possibly stay up without their eyes drooping like mad, then sleeping until 1:30 PM after they finally fall asleep