You can control the spacing between stamps in a stroke so they are close or far apart, or so their spacing has an element of randomness.
In the Brush Options window, do the following:
You can make stamps rotate in the direction of a stroke or always remain in the same direction, or rotate with an element of randomness.
In the Brush Options window, do the following in the Brush Stroke section:
To always keep the brush stamp in the same direction and not rotate it in the direction of the brush stroke, turn off Rotate to Stroke.