Islands are better because you can sail the seas between them as well as climb high mountains. I like that.
I did some fantasy world creation once and I started with a coast line of a large interior continent. I wasn't aware that I was just creating the same place that I lived, the east coast of America. I like coasts though, because of all the fidley bits along the edge are fun to draw and having rivers, inlets, and sea ports add interest. A new character can just arrive aboard ship at any time.


