Good day Shin, it is interesting what you have written on the subject of sleeping. I too have my times when I awake in the wee hours of the night, and some times I go into my radio shack and play radio for awhile. Unfortunately I suffer from Sleep Apnea and use a CPAP machine to help me breath more consistently. When I first began using this type of machine over five years ago I found that sleep was important and it made a big difference in how I felt in the mornings. I have always been a morning person, but for a few years prior to learning about my sleep disorder, I began getting up in the mornings feeling groggy and not very wide awake. This was prior to my retirement, and it was not much fun getting ready to prepare for a day at work. I would often sit at my computer at work and fall asleep. I was embarrassed on several ocassions when someone would find me sleeping. I finally asked my doctor what was happening to me, and he responded by sending me to a pulmonary specialist. The results of his exam and a sleep test, informed me I was waking up many times each hour from my body not getting enough oxygen. This resulted in me being told I must use the CPAP machine. At first this machine seemed like a large pain in the you know what! But gradually I grew to feel comfortable with its use, and now it seems like I am missing something if I go to bed without putting on the mask and turning on the machine. I even found that a 20 minute nap in the middle of the afternoon was worthwhile if I would wear my mask and use the machine. So I average well over six hours a day wearing the mask to improve my oxygen intake while sleeping. While I still have times when sitting at my computer (at home now) and falling asleep. I truly find that when I wake up in the morning whether it is still dark outside, or whether it is well into the daylight hours, I feel much more rested and intersted in what the day will bring. I still have my times of waking up in the middle of my sleep period at night, but going into the radio shack is fun and restful for me. I still think Ham Radio is a great hobby for anyone who likes to have a chat with people now and then.