from as far as i can recollect, i've felt the need for "doing nothing" for a while on a daily basis, call it "down time" or "me time" or "recharge time." it came naturally to me, being INTP by nature. come to think of it, it was only natural. today, i'm pleased to see an article on it, "The Importance of Doing Nothing!"
http://forbesindia.com/article/insead/the-importance-of-doing-nothing/38144/1