As others have mentioned I very much liked the overall composition on most of them and in general think they are really good for the short time you have been at it. My only real criticism would be the unatual HDR look and what appears to be over sharpening on many of them.
The HDR look is not overdone in my opinion but to my eye seems apparent that you bracketed many of these shots and probably merged and tone mapped with some sort of HDR software. Its only my opinion but if you can pick up some more advanced manual blending methods using luminosity masks to blend your bracketed exposures it would really boost these images to the next level I think. Especially with the landscapes.
It could just be how the webpage is displaying your images but when I magnify they seem over sharpened to me. These are just my opinions please take them for what they are worth.
I did not read any of the above comments until I had gone to your page, and whaddaya' know, I had the same feeling: too HDR-ish for my tastes. In a number of the desert southwest shots, the shadows are so open, and so light, that the shots scream
HDR-tonemapped too much. To me, that looks wrong on this type of traditional, straightforward landscape shots that were made under normal, everyday lighting conditions.
I think "Serenity", your snowy landscape, is simply gorgeous!
Serenity by Jaime Miller