1) Good; enough detail in the distance and water reflections.
2) Good; detailed forest, mountains as a background eyecatcher.
3) Average; landscape, shadows and clouds portrayed.
4) Average; no eyecatchers.
5) Not good; too much plane, too little landscape.
I would have to disagree on some points here

1) Not good: No scenery, and the water reflections are ugly on that shot, and the angle of view is not very original.
2) Average: the scenery looks nice, but the plane is too far to offer any interesting details.
3) Good: The scenery is almost as good as the previous shot, but this time we can see the details of the plane, with nice colors as well.
4) I completely agree here. The clouds are good, the scenery is just ok, but there is not eyecatcher at all. A closer plane with more colors would maybe do the trick, since the angle of view is not bad.
5) Too much plane ?... Yes maybe, I don't know, sometimes it can look really good (remember the shot from Waspiflab), but in that case you would need a slightly different angle of view, and a more interesting background as well
