I'm like the original poster, I average about 13 hours, sometimes 16. About once a fortnight I stay up for about one day, but usually because I'm feeling to good being high on Heroin, drinking and gambling at the Casino. When I get the "afterglows" though, I'll sign into a motel and sometimes sleep for a full day.
The way I look at it is sleep is anything but bad for you. We all need our sleep and because I get a healthy amount of it, I think that's the reason why I never catch influenza. I think it's also extremely good for your skin and keeps you looking younger, because I am 25 years old and look about 7 years younger.
My family says that I am sleeping my life away and that I have plenty of time to "sleep" when I'm dead. But, I just enjoy sleeping and dreaming so much that I'm not willing to give anything up for it. I've lost a couple of relationships because of it, but I can't see any problem... it's not like I'm hurting anyone. If anything, I'm refrishing my body, soul and mind.