In Islam sleep is considered as blessing and security and a sign of Allah. I'm not 100% clear about the whole thing. Of course its a sign of Allah, I read here:
http://islamfrominside.com/Pages/Tafsir/Tafsir%2839-42%29-Sleep%20and%20Death.html
But what about the people who sleep more or less. We generally try to sleep less to have a productive day. I cant sleep less than 8 hours a day, but I eel bad when I hear that many of my friends sleep 4-5 hours a day and they are perfectly okay! That means they get extra 4 hours than me in a day/ 120 hours in a month/ 1460 hours in a year! They can hold an extra graduation degree and lots of tahajjud prayer than me!!!
I did try in various ways to sleep 4-5 hours a day, but things got in worst way, had drowsiness whole day and had to feel up to 8 hours completely. After trying in several ways in last 2 years the result of reducing the sleep span is 100% zero.
If I don't sleep exactly after Esha prayer I do miss the tahajjud prayer often or have to wake up and pray tahajjud in a hurry. I became frustrated that than how is it a blessing, where my friends are getting more time to utilize the day and for prayer! Please don't tell me that I didn't have stronger intention to wake up for prayer or study. I do have more intention than these I know. If I didn't have the intention I wouldn't become that frustrated. Definitely the problem is somewhere else which I'm not able to understand yet. And thats why I'm writing this.
What happen when I go to sleep I completely forget everything about this world, thats why I really get a restful long sleep. Still, I cant welcome that restful sleep which is giving me less time to study, work and pray than my other friends.
But in Islam, it is said as a blessing, then why? Then those who sleep more (not as a leisure but who cant help to do less) are more blessed? How is it a blessing? When I'm getting really less time than some other people to fulfill my responsibilities. Or can sleep be considered as meditation, by which we can go to depth of everything and while those who sleep more are getting less time during a day are they also able to complete the exact responsibilities and can be as successful like others who sleep less? I didn't know any good examples around me yet.