I am not sure what the issue is with my experience. I do have two 2 D Mag Lights that I have not had corrosion with. I tend to have better luck with composit lights. I have a number of Pelican lights I rely on now, but I do carry a few disposables in the trunk of my car as "leave behinds" if necessary. I do like the Pelican Super Saberlit submersible. It is a decent light with a great beam, a tad big. The Pelican lights with side by side AA batteries are of a nice size and easy to stow. I like to stick with lights of the same battery type as much as possible of late.
Flashlights are just one of those "tools" that you can't have too many of.