I guess my sleep is typical insomnia, takes a while to get off then wake about 3 or four hours later for no apparent reason. Then I'm wide awake. I have been through short periods where I've slept for about six hours but I've never found out why. I've reached the stage now, after two years, where my other symptoms have gone and I feel optimistic again, so it's puzzling how my sleep issues are lingering. I know what you mean about the feeling of sleepiness is missing. I wonder how you can get that feeling back? That Sunday morning feeling where you just yawn and drift off again.