This Photoshop brush set contains the brushes I use for my personal and professional work. 

I don't use a lot of brushes, 99% of the work is done with the chalk brush. But it's the best one! All images above have been painted with this brush for example.

I use it at 100% opacity to block in my painting, or at lower opacities to render.  It gives a nice painterly texture and makes your work look less digital. There's two of them but they are almost the same.