We're not generally huge fans of simple sleeve-style cases, but the textured genuine leather in some of the Turkish company DC Cases' recent Luxury Leather Cases for iPhone 4 and iPad did get our attention. While floater, monotone, and "softy" leather cases are common enough, the "vegetable-washed" versions have an oddly interesting papier-mâché-like look that is offered in gray, pink, and white versions. All of the cases are variations of some…