I miss deep sleeps, so much so that I forgot it was possible to have one. It is probably symptomatic of a mind too busy worrying about every little detail in life, that it loses the ability to shut down, even if only for 8 hours or so. The wonderful thing about a deep sleep is that you're able to wake up not thinking about what you were thinking about yesterday. A clean slate - that's the only way to go. Alas, I should probably cherish this while I can, for tomorrow will surely see a regression to the vicious cycle.