David,
thank you for you comment.
I've been experiment with some graduated nd filters and HDR exposures.
I'm not a big fan of high ISO shots. Although i've used for testing purposes and i was really surprised.
I'm still learning the do's and don't in photography so that's why i say they are mainly experiments. Lots of photos were shot with different exposures and mask them with parts i like and i don't
Some of them have PP too ... so, as i said, experimenting
I must take an entire day to go hicking and get some photos. Those are mainly snapshots of the moment. Just to understand the lack of time and the weather, i bought a cullmann magnesium tripod and didn't have time to try it ... and i received it like, one month ago
But i'm really enjoying the camera, for real

My next camera will be a Sony for sure. I bought the A550 just as a good camera to learn photography once again and to get used to Sony system.
As far as HDR, i'm still trying to understand the best method to take HDR photos.
I found that taking an underexposed photo works better to get that HDR feeling. All the photos i took with correct exposure looked somehow "weird".
What technique do use to take the HDR shots?
regards from Portugal
Pedro.