I wear my Sperry Billfish 3-Eye shoes all the time, not just while boating. I like a shoe with a thick, cushioned sole, and they qualify.
Same goes for my Ecco sandals -- great for boating and life in general. I tried a couple of other brands of sandals, and the design of the straps made them dig into the tops of my feet. The Ecco are the most comfortable that I've found.