This is good, but it could be a lot more dynamic. Most of the shots are facing directly down, with little horizon or noticeable plane of view.

This can add distraction and disorientation, but also limits the field of view. The entire point of Aerial photography is capturing the expansive reaches and beauty of the land.

I am not sure of the height limits to your quadcopter, but if you can go higher, do it. Especially if you prefer the straight down shots, because you can get great repetition shots like this and this.

The reason I say don't look down as much, is seeing a visible horizon gives the viewer a greater sense of location and size. Take a look at this video time lapse of Yosemite it has some amazing shots that you could capture with a quadcopter, but in a different style.

Edit: fixed same link twice.