The car waits until about 3% down before topping off, even if plugged in, when off. Mine sometimes waits a few days between charges if I leave it plugged in but unused. If you turn the car on while plugged in it will draw power from the plug, even if it is not a scheduled charge time.
I just found out about cabin overheat protection's vampire drain. According to my TeslaFi logs it prevents the car from sleeping (which is near zero energy drain). Just turned it off yesterday, but I'll want to remember to turn it on for most trips. Might save me around 3 kWh/day.
The various logging apps can be big vampires, though the defaults for TeslaFi give pretty minimal drain. Mainly they need to allow the car to sleep. "Sleep" is the lowest vampire loss state, better than just off and locked.
Smart conditioning tends to run climate control when you don't need it, draining power.
Extremes of heat and cold can cause the car to heat or cool the battery.
As I walk around the house with the fob in my pocket the car's marker lights come on occasionally in the garage. Looking at the TeslaFi logs again, that wakes up the car and ups the vampire drain until the car goes to sleep again. I've seen it go back to sleep within 4 minutes, but sometimes 1.5 hours.
And of course the classic energy saving on and always connected off minimize the base energy drain. I suppose those settings might enable the ability to sleep.