So, the company van I drive, when you take the keys out of the ignition, the radio stays on until you open the door. I always find that unsettling. When I park, I take out the keys, get whatever stuff I need (tools, notes, my lunch...), take out the keys, and inevitably think "wait... why is the radio still on? Did I leave the keys in the ignition? Are the lights still on? Did I forget to do something?"