Shutter speed seems a little slow. Lots of blur. I'd look at how your exposure meter settings are set up. My best guess is that there may be to much stuff set to auto and average. The airplane should have been extra sharp. You have stoped everything but the prop even on an overcast day. Otherwise the camera may write too slow.
Composition varied from great to un-focused. Good use of the rule of thirds in most cases. Depth of field was lacking. That may also be from to many auto settings. The use of a mono pod may help. You need to learn to twist your body to get compounded angles. A lot of the stuff was shot dead straight. When you shoot stuff like the waterfalls, try a vertical shot, same with the eagle and the swan shots.