Upsides
The TV is always on the "right" channel. The volume levels are always perfect as well. If you want to watch "Fight Club" for the 12th time. Go ahead !
You decide "whats for dinner"
Privacy! Unless you spy on yourself, absolutely!
"Are you crazy"? Is no longer a question someone else asks.
You have already asked yourself at least a few times and answered your own question simply by asking your own self said question.
Your own jokes are amazingly hysterical!
All of them !
"Is that your glass on the coffee table"? What glass?
House temp? Perfect!
Downsides
Mops, brooms, dishwashers, taking out the trash , stoves etc don't happen unless YOU do it.