I’ve only been to the center of Ogunquit, so I can’t comment on how nice Marginal way is, but it does have nice, if not super crowded town center in the summer

What type of feeling are you looking for, I would have to say that Boothbay Harbor is mine, a nice “quaint” little town with shopping, a waterfront, and good restaurants. If your looking for views/ walking on the beach I’d say York, Cape Elizabeth is nice for Fort Williams and 2 Lights State park, along with lots of rocky areas to climb