Cooler or Warmer Nights

Recently in Women's World magazine there was an article about that it's better to have it a little cooler in your bedroom to sleep soundly.

The article stated that 68 degrees is perfect sleeping weather for the winter.  It says a cool bedroom helps lower your body's internal thermostat--which makes you drowsy and gives you a better nights sleep.  I usually have my thermostat set at 72.  I wake up sweating sometimes, though.  Tonight, I'm turning it down to 68.

Do you like warmer sleeping or cooler sleeping nights?

What is your thermostat set at for sleeping?