I think I win so far (or lose, really

). Got our most recent bill while at Disney. $701. Our entire house is electric (we don't have natural gas in our area - only other option is converting to oil or propane). We keep the thermostat at 68 in winter and 72 in summer. The house is about 3500 square feet. During the summer, even when it's 95+ outside, the bill rarely gets higher than 175. So it's the heating that does it. We've added insulation to the attic, which has helped a bit. We also turn off the heated drying feature on the dishwasher, which shaved off about $50 per month, if you can believe it (we're a family of six, so it gets run a great deal).