It has interested me for many years that in a society where we know sodium contributes to health issues, our supply of assorted gourmet salts is increasing.  In all honesty, for average cooking as in salting water or soups, I grab the old standby of Kosher salt,  For applications where the salt is added after the preparation, I often add Maldon Sea Salt Flakes from the UK.  My arsenal includes salts from all over the world, but there is something about this one that is my favorite when chocolate items are finished off with salt.  Caramels made with salt really pop when the Maldon is used.  I've had Maldon sea salt flakes in my cabinet for many years and doubt that I'll ever be without it.  It's that good.