Probably my crockpot, which I love because it takes almost no effort and I never make a bad meal with it. I use the toaster a lot too but I suppose I could grill the bread on the stove in a pinch.
I have a Kitchenaid Stand Mixer that I received 3.5 years ago for our wedding, and I can count the number of times I've dragged it out for use on one hand...I use a small handmixer most of the time just because it's easier to get to, clean and put away. In my small kitchen the KitchenAid lives in the pantry, so I pull it out pretty much only for holiday baking.