1st is meh. its not a particularly poorly done HDR considering the tonal range, but try to clean up the halos in the trees. composition is decent, nothing special.
2nd is your strongest. nice layering of content in the frame and nice B/W conversion. All the noobz will probablly come screaming about the rule of thirds and centered horizons but breaking it can create an effective photo if you're deliberate and use it carefully, as in this photo. I would have moved the camera to the left to include the left edge of the driftwood, as the cut off edge can be buggy.
3rd is meh. the sole focus of the photo is the graffiti. If it wasn't there, would you have taken the photo? It is an interesting thing to include because it makes the viewer have questions and curiosity, but I would have either pulled back wider or changed my perspective to include the context of the environment. As it is now, its just a cool hip picture, but including context and telling a story through the graffiti and the environment its in will give a photo so much more meaning and impact.
4th is a pretty picture, not much more. The castle and clouds have interesting textures, and that's the focus of the photo. If you were striving for a more abstract exploration of the textures and shapes than its not bad, but i want to see more.
keep working. take the time to consider composition and perspectives more carefully, and be deliberate in what you include or don't include in each photo.
