That is a really great piece of work! I love those mountains, and the color scheme is great (even the red lettering - unlike Gandwarf, I LIKE red text ), except for one bit, which I'll get to below.

As far as the vertical pattern - I kind of like it; it offsets the mountains and makes each (the plains and mountains) stand out more.

The only two things I'm kind of meh about are the extremely dark blue color of the coastlines - to me it conflicts too much with the text; and the 'sparseness' of the forests. They just look kind of thin. Maybe add more trees to flesh 'em out?