Generally you have a good eye for composition on those. The couple things I'd pay attention to are:
- focus : some of the butterfly/bee/flower type shots are a bit soft
- Usually composition is good, but like in img_1911 on the first page action or lines tend to pull the eye off the edge of the photo, rather than into the photo.
- Horizon Lines : a couple shots seem a little off... for some reason this is one of the first things I notice with outdoor shots and it tends to make it tough to care about the rest of the photo... Oh, and try not to have these centered in the photo. Think thirds..
But as I said, you have a good eye for content, just need a little fine tuning...
Take a little more time to make sure the camera grabbed what you eye did. Basic proofing of the shots should catch all of the issues above.. For macro type shots, you should zoom in on the photo on your camera as most LCD's won't give you the resolution needed to verify those details at full size...
- Lake/Moon- (lower or raise horizon for better shot, but still works well as is..
- Lighthouse... Maybe have a little more blue/ocean in lower left to give it some pop... might be about 1/3 to 2/3 under exposed... Kinda like some of the other comments about boosting saturation/color..