Top of my list would be yogurt maker, long since consigned to Room 101, sandwich maker didn't get a lot of use although we often use the toasted sandwich basket thingy that we bought as an accessory for our Dualit toaster. I occasionally use the George Foreman Grill, but it was in constant use by own of our sons when he lived at home. I do use food mixer and blender maybe a couple of times a month. Someone upthread said they never use their milk frother, we use that daily along with our coffee pod machine. Also wouldn't be without simple hand balloon whisk, costing a few pounds has always been one of my most invaluable kitchen implements, excellent for ensuring roux based sauces are smooth, I'm eternally grateful to a domestic science teacher for introducing it to our class