People for whom insufficient sleep means that they are more likely to be able to fall asleep, even if they are awakened by external sources.

Do you find such people excessively normal in other respects as well? ;)

I can relate... it's very easy for my sleep schedule to get completely fsck'ed up and very hard to get it back on track:

• Me: "Enough of this, I'm getting to bed at a reasonable hour to get my sleep schedule back on track"
  
• My body: "Oh no you don't!"
  

As I said in another LJ entry, why can't I be as wide awake at noon as I am at 4AM?

Bleagh...