Here are few customization we are looking for
Changing the brush stroke on background Grid lines (I have seen few properties where you can bring them front, back or hide them)
Changing the color of a specific column based on value
Adding number to display value for each column
I believe I am addressing your other questions in other threads.
To customize gridline color, the properties are on the axis:
MajorStroke is the color of the major lines.
MinorStroke is the color of the minor lines, etc.
Hope this helps!
-Graham