Ampguy; I like the idea of your shot of BIG sky country. The clouds make the picture, but the grass and fence set the place. To improve it I would like to have been a bit closer to the fence and seen a little more detail in it and the grass. The large area of blue sky at the top could probably be cropped to tighten composition. Perhaps a polarizer would have given a boost to the clouds and more impact.
Nuno; Nice beach shot. The shore line carries your eye to the boat and couple, but they are rather small and seem to be hiding behind the dead coconut palm. A closer view point would have helped. The tree is what catches your eye and it takes away from the beach and boat without really being the main subject.
Raid; The fall colours and water go well together, but the shot is a little too busy to my eye. There's a lot going on, but the eye needs something to hold it. The slow shutter speed shows the water movement well but the rest should be tack sharp and it isn't. If a tripod was used I wonder if this may be due to the scanner? It looks like this might be from a 35mm slide as I can see the mount.
Silva; A peaceful walk in the country photo. Would go for a tighter crop to bring out the age difference between the old stone wall and the new wire fence. Crop out anything that's not helping.
Guess I'm a bit of a ringer in here. My shot was done on 4x5 Tri-X with Linhof Super Technica and 150mm Symar. Was camping on a friends farm near Vernon BC and got up early to take a pee. The light was so beautiful that I grabbed the camera, resting it on top a handy fence post. Used rangefinder and viewfinder rather than the usual ground glass, so I feel this one is OK on RFF. Before taking the picture I almost relieved myself on the electric fence around the horse corral. Had that happened I might have been shaking too much to hold the camera. 😉