Secret Santa - I use Diamond Crystal because I only stock one type of salt in that rough grain size. I prefer it for salting for two reasons. I find iodized salt to have an odd background smell I don't detect in DC. That's the reason I got into the habit of stocking DC years ago. Now, as my sense of smell deteriorates with age, the main reason is that it is less salt by volume. I salt to taste and I find it easier to avoid over salting. That and the shape of DC salt makes it easier to salt by hand. If you have the chance and inclination to buy some you'll better understand what I'm talking about.
It is not religion for me certainly and I never expected to get flamed here for using it. It's just what I am used to. YMMV. I like salty but only to a point. Over salted is one of my least favourite things to eat so I am particular about my salting methods.
Salt is only slightly more expensive than dirt so I don't worry about it.