Actually, most normal working people are similar to the second person.
Only few people have sleep patterns like me (first, erratic graph), and I have them because I spend often my nights working on projects, trying to build new products, and once I've started one, it's hard to stop.
Only few people have sleep patterns like me (first, erratic graph), and I have them because I spend often my nights working on projects, trying to build new products, and once I've started one, it's hard to stop.