I too am so excited to be learning about textures! Let me start right off by pointing anyone who is interested in learning more about textures, and in getting some awesome freebies, over to Kim Klassens website! That's where you will find all of the goodies! She has great tips and tutorials, you can even sign up for once a week newsletters and freebies!
As far as textures that I have been using, they are all directly from her website! (all free) The latest one I used for one of my most recent posts "The Lovely Luncheon" was called
"Simple Things Sample," so much fun!!!
Thanks for the questions and have fun with your new Textures!!!