Redhead!
Anyway, I chose Mountain.
Oceans can show pure serenity and peace, and give you nice fresh air. They can also show danger though, and being so open they can make you feel vulnerable.
Mountains ofcourse present awesome views over the country. Also I imagine that you can see the stars better at night, since there will be less light pollution arround. Mountains will give you fresh air too, especially if there are woods near. They also give you shelter so you might feel more safe.
Mountains also can give avalanches and (snow)storms though.
I prefer mountains because it provides a place where you can be alone and safe, enjoy the views and see the stars at night, so all in all, more peace, which I value very much.