We've done the pre-lit artificial for years. This year I think I am going to buy/rent a live tree, (yes, a local nursery will rent live Christmas trees to folks!), the kind with roots and all. I just really miss the scent of the tree and even the hassle of watering everyday and the sap on my hands from stringing those danged lights. I'm hoping a live tree wont drop as many needles.
We always turn off the lights at night and if we arent home. I disconnect the individual strings at night as well, just in case.