Synethetic - I found this a hard subject as well. Nice details on the tyre, was the forks and brakes nessecary in the Image, cropping them out and the end of the OOF wall may improve it.
Rural - Nice details in the clouds and trees.I also think the church may be too central. I would try moving over to the left a bit, so the church is more to the left of the image, but a see a red thing on the right which might show too much. You could also try over to the right and hopefully get more of the church showing through the trees. Not being there it's difficult to see wht you did at the time.
Bright - looks much better on Flickr, top job.
Elegant - nice flower but soft, leaf intruding in the bottom left appears sharper. I think you need more practice with your extention tubes. Did you use a tripod?
Derelict - image on flickr shows better contrast, do not be afraid to get close and reduce the exposure range(i.e no sky).