I know this has already been covered but, twelve pictures are far too many, the forum rules state, “Posting many pictures - Do not post many pictures in one message, instead post a link to a gallery. Posting several messages with just one image in each in a short period will be treated as SPAM - it will be deleted” so restrict the number to just a few. Continued posting of this many pictures will get the thread moved to the Challenges and Galleries forum, and possibly get you banned.
Your galleries are apparently private so there is no way to check the exif data for your pictures. You should include the exif data so people can see what setting you used and make informed suggestions on settings changes.
The first picture is cluttered, far too many things to look at. It appears that the camera focused on the seedpod on the right side of the image rather than on the bee. The picture also looks very noisy which could be caused from underexposure or high ISO or both. If the light isn’t good, and I don’t see any shadows to speak of, pop up the flash.
As eNo has already stated, the 18-200 isn’t your best choice for close-up photography, which is one reason I went with the 18-105 (which is actually pretty good for close-ups), the other being I already had the 70-300 which is much better at 200mm than is the 18-200.
I’d strive for a narrower DOF (Depth Of Field) so the background isn’t in focus and the user doesn’t spend time looking at it. Opening the aperture has the added benefit of allowing you to reduce the ISO when the light isn’t what you want.
I did some very quick edit to demonstrate how this picture might look with a narrower DOF and what I think is better composition with less clutter. It is very difficult to duplicate a narrow DOF using PP – you are much better off using the camera and lens to achieve the effect.
Do a Google search on composition and learn a little about some of the rules. A good place to start is the Rule of Thirds, just don’t regard it as law, it is more a guideline than a rule or law, and sometimes maybe you want a Rule of Fourths – don’t get hang-up sticking exactly to thirds. There are times when you definitely want to ignore it – but most of the time it is good to have the Rule of Thirds in mind when you are composing your shot.
