Would #3 be better with the grouping of three off to one side a bit, not right in the middle? Maybe the background does not permit that to happen, or is too busy.
What is the focal point of #5 intended to be? It is busy with the same element across most of the picture.
Thanks Roger for your consideration ....
- The lack of image 2 is my error (I added a photo then deleted).
- The No 3 I liked the colors of context
- The No 5 wanted to show an area full of thorns, even if the error is that they are non all in focus.