They're all programmed to act like loving minions when
you walk into the kitchen offering their services even
fighting among each other for your attention.
(all appliances cheering as you walk into the room)
"Yay! He's here! Let's make breakfast!"
(toaster) "Ohh ohh pick me! Can't start
the day without
making some delicious toast!"
(coffee maker) "Oh please, how you gonna start the day
without a cup of coffee, we all know he's gonna pick me
first!"
(stove with a low voice sounding kind of dumb but
lovable)
"I think it's not breakfast without scrambled eggs, but we
should let him decide."
(microwave) "Oh please, in the time it takes me to nuke
a
frozen burrito you're just warming up. If you've got
things
to do, places to be it's me stove, so shut the hell up."
(User pops a packet into the coffee maker which yells
"Hurray!", rest of the appliances say "Awwwww!")
You could adjust the personalities, rate of conflict, etc.
You could even have them programmed to do positive
affirmations like "Strong cup o' coffee today eh? Sounds
like a power day in the making!"
Addendum: They could also be told to walk you through
recipes. Each appliance walking you through how they're
used for whatever it is you're making. So you'd say "Hey
guys, I'm making coq au vin."
(sink) "Okay, fill a pan with about an inch of water."
(stove, seeing that the correct amount of water has been
dispensed from the faucet)) "Now put it on my front
burner and turn it on low and add the mushrooms to
simmer."
Each appliance would in turn tell you how to proceed.