To me the first one is a snapshot of info, useful mostly to you, not photographically interesting. The second two are of more interest. Exposure: I think they are both a little under exposed- they could be lightened up easily in PP. Composition: There is some dead space to the left in the second one and the stream seems too centered. I think the first waterfall could be improved if you cut out some of the top and included more fore ground- a place for the water to go would be more attractive than the rocks above, to my eye. The subject is lovely, I love the landscapes. I hope this is useful to you...JSD