I adore the sea - I'm drawn to the sea and I live near the sea. I do like my home to be reflective of my surroundings, but not in an over the top way. I have definitely inherited a less is more style when it comes to my home. My grandmother was a minimalist, that I certainly am not, but I do think sometimes one or two statement pieces is much more effective than a "themed" room. Themes can become overkill much too quickly and in my opinion are best left to children's rooms.
In the pictures above, and below, you will notice how powerful a simple statement piece or two can be to evoke a certain mood.
via Completely Coastal
original source unknown, via Pinterest
via Props and Styling
via House Beautiful
via Houzz
via NE Home
I also love these two photos below. How is it that I had never thought to place a few shells in a bowl with flowers? And a simple grouping of like glass jars filled with sand, river rocks and driftwood is so easily replicated. If you have children let them help you amass these items!