What Salt Should I Use?

Equal weights of different salts, photo by Donna. Notice the difference in volume between the kosher and fleur de sel.

After my minor salt rant, a number of people asked which salt to use and what I thought about various salts.  There are a mind-numbing array of salts out there, even big blocks of salt you can cook and serve on.  But, with apologies to Mark Bitterman, whose work and business I truly admire, I stick to three salts.  Kosher is my all-purpose, everyday...