Do we spend too much time sleeping our life away?

I am a five hour sleeper. Five hours of good sleep and I am ready to face the world again. Anything over five hours and I am draggy all day long. I could never sleep 8 to 10 hours a day. There is too much to do and see, before I leave this earth. Question: how about you? Do you also just sleep five hours a day or are you wasting your life by staying in the sack 8 to 10 hours?