Lucid_Dreamer
Veteran
So at 0.234kWh per day, the X360 would cost you about $12 per year for one hours playing time per day, if my quick math is ok. I guess that's not really a significant number to convince people to be careful about leaving them on or using them heavily. Although, I have no idea what the real average usage time is for a new console.
Personally, I leave my PS3 on for most of the month. My bill is around $70/month for a 2-story and full basement home. Before the PS3, it was around $60 to $65/month.