Le Crueset dutch oven. soups, stews, browning meats, as a cloche for baking bread. on the stove, in the oven, in the BGE.... without a doubt the most important tool in my kitchen. And they last forever. My mom just gave me the oval one she got as a wedding gift.
and my bike. any of them. any bike really. essential. I've never got back from a ride in a worse frame of mind than when i jumped on it.