Waaaaaaaaaaaaaaay too many pictures. Post fewer of them per thread next time and you will likely get some more specific critique... one at a time is my favorite, personally.
That aside, some general comments...
1. Welcome to hell, my friend. I know a couple graphic designers that plunge into this area and they tend to have an amazing eye and get driven absolutely insane by the technical aspects of the process. Keep your head about you, remain calm, don't give up.
2. Get a polarizing filter. Some of your shots are taken in midday and the harsh light kinda kills the pic.
3. Try to take shots at dawn/dusk, you'll get more dramatic light.
4. Try to keep the sun at your back or at worst to your sides- you'll get nice blue skies. (polarizing filter will amplify this effect, btw)
5. Don't oversharpen. A lot of these images are -way- oversharpened. Zoom in to 100%. If you see a "halo" effect around the edges of your shot, you may have gone too far. Also experiment with Smart Sharpen vs Unsharp Mask... in certain shots one or the other MAY have a better effect, but it varies.
6. I think your shots tend to lean towards "too busy", but I think the sharpening is amplifying this a bit. Example is all the grass or weeds right in the frame on some of the subjects. (unavoidable on some, I know) Try to simplify your subject when you can.
7. Some, but not all, of your shots are dead-centered. This -can- kill a shot. The best example might be that smokehouse or whatever it is. It's a -really- cool little shot, but I think it's killed a bit by being dead-center in the frame.
8. I would personally try to avoid "bleeding over" too much into your graphics design background. This is photography, not a course in photoshop tricks. Try to get the best image you can, and then if and when you decide you need that shot in something you are doing in "your other career", do whatever you need to do to make it fit the needs of your piece.
I think you (as many graphics professionals do) have a
lot of potential. Many of these are either nice, or damned close to nice. Keep at it. Keep posting. I look forward to seeing more of your results.