First, I just want to say that was a wild ride, going through years of my Amazon purchases. My best purchase seems silly, but I wear them every single day - stainless steel ball earrings. They're easy to sleep on and don't irritate my ears.
My least favourite was this super-cute pair of heels by Naughty Monkey - they were way too thin for my feet, and the material of the shoe was very uncomfortable on my heel when I put them on, so I never ended up wearing them anywhere. I should have returned them.