Opinions appreciated for lumber selection for cabinets in sh

[pikos]

I love carpeting and woodworking and I am planning on using some of the corrugated tin that was on the shop originally as the lower part of the walls (4 ft or so off the deck) and old fence pickets that are gray in color. (will look like barn wood) I am wondering what you think would be a good lumber to build cabinets out of that will look good against that back drop. I want the place to look nice and originally thought about doing dry wall......but I would like the ability to place a screw or nail anywhere and getting it to hold. It will have a little bit of a rustic look to it so I am curious what you guys think.

Thoughts?

Thanks in advance.