the first 2 are the best, in the first it bothers me that the top of the rock is almost even with the horizon, get a higher or lower angle to separate them more and its good. the Second i would crop the bottem out a bit you have a lil bit too much dead space. and the horizon is just a little bit too centered. You have a lot of chromatic aberation going on here but thats mostly your lens's fualt. the night shots of the river are just snapshots, theres no clear subject and composition is just messy, i would go back and shoot thos. if you can. and zoom in and make them vertical. the faris wheel needs to be vertical and wait for it to start moving and take like a 15 sec exposure so its blured. the water with the bridge ship and house boat thing needs to be croped vertical and much tighter only showing thos 3 things. Unless something is an extremly photojounalistic moment like the assasination of bush. if your pic is under exposed and missing the detail you need, delete it dont try fix it and put in a portfolio. so get rid of the dark night shot of the field. In dali you put the clock tower behind a light post and a wire is cutting threw it too, got to find a better angle and clean that up. really take time to look around the composition before you take the pic, less is more you don't have to fit everything you see in to the pic.