I have built many decks over the years..
This is my current deck here in Texas. Built around 2001,I believe that it is 12X16 (crs). The wood is treated radius boards.
I started out leaving it natural no stain, the next year I had to apply stain due to the hot sun down here. Two years later I used a paint stain, that lasted another two years, then I used a porch and deck paint. I coat it every other year. The pressure treated wood is holding up very well considering the sun and dry down here.