My experience on a boat(besides the occasional) was the two-weeks I was on a Salmon fishing boat up in Alaska, near Sitka. A couple of hours of sleep nightly, diesal fumes, a grumpy boss, and mega seasickness... together it resulted in my losing about 25 pounds, and being glad to be back on the ground. When we hit the fish processing plant, I got a job there instead, for the summer.
I have always longed more for the islands than the sea. You stop on some beautiful ones?
imho, Jerome