Very hard to view when they're spread horizontally like that. In future, could you post them vertically (That is, one above the other, with a couple of blank lines between them) and as well number them?
Overall the subject matter (Except for #4 - can't quite figure that one out) looks nice, but all have exposure issues. #2 and 3 have very dark mid-ground regions as a result of the metering compenstating for the sun, and #5 is at least one stop under-exposed overall.
If this is the sort of work that interests you, and it would appear you have an eye for it, you're going to need to pick up some graduated ND filters to help reduce the brightness from your skies, as well as a circular polarizer.
How are you metering these scenes?