My husband is a night owl. He stays up really late, and I mean really it's not uncommon for him to go to bed around 2 or 3am, even 6 am sometimes! He even found a hobby to support is late night habits! He has gotten into Astrophotography, so he takes pictures of planets, galaxies, star clusters etc. He has gotten a lot better at it and his pictures are turning out rather nice. I'm sure I picked the wrong picture here, but this is one of his shots.
I on the other hand am not a night owl, I could go to sleep at 9 and get up early. I find it interesting how our children are just like us. Our son is a night owl and our daughter is a early bird.