Nothing new there really is there?
Not enough sleep isn't good for you. Too much sleep is no good for you.
Me personally, i'm all over the shop, i work split shifts, with my second shift finishing at 22:00, so when i get home it's impossible to unwind and go straight to sleep.
Been like that for years now, too much coffee during the day and early at night, stress from the job, kids, all the 'world' pressures, gaming, internet browsing, bedroom next to a main road, the list goes on.
Can't remember when i had a decent good night's sleep. Been too many years...
