Since I'm still a DF amateur and there are a number of new features (like the Z-axis) that I want to safely play with, I looked for some mountains and scouted their foothills for a calm area with a river.
Since I had tried my best to pick out a region that looked like the old starting area, imagine my surprise when I enter the game to find my dwarves come to rest halfway down a river valley cut out of the mountain itself! A thin strip of woodland surrounded on both sides by high cliffs that grow increasingly narrow to the north. My first impulse was to reroll and find a spot with more room, but after a brief survey I start to grow fond of my little nook. There are plenty of available trees, particularly to the south around the mouth of the valley. The remote location might also reduce the odds of invasion.
After scanning four or five levels above ground I pop out of the mountain above my settlement to find a plateau rich in greenery! Awesome! The plateau slopes steadily to the south until it reaches the starting level at the edge of the map. I instantly revise my original plans and decide to build all non-storage/workshop rooms inside the mountain but on higher levels, tunneling up through the mountain until I breach the surface, creating a secondary roof entrance. I need to look into making windows. If all goes well I plan to have a dining hall on upper level 3 or 4 meeting the cliff face with windows overlooking the beautiful valley below.
I anticipate similar surprises with future forts. The sheer unlimited potential of startling locales is mind-boggling. I really like the layout of my dwarves new home. Each landscape presents a unique challenge and allow for so many different fortress styles.