I've got a mate who sleeps 4 hrs a day and is still a fully functioning human being. He swears the secret is to make sure it's only 4 hrs otherwise he's knackered the whole day. 4 hrs good 3 hrs or 5 bad.

Me? I work shifts so sometimes the alarm goes at 4am and sometimes it goes at 4pm but no matter when it goes it's pointless for me to go to bed before midnight, otherwise I can't sleep.

Anyone else have weird sleeping habits?