Saunders Waterford is my paper of choice. I could paint on others, but I am familiar now with it's behaviour to my painting style. Now I prefer the 'Rough' texture paper to either NOT or Hot Pressed. There are tow quite different sides to this paper, not smooth of course but one being rougher and having a grid like pattern compared to the other side being more random in texture and not so rough. So taking a similar subject, I paint on both sides...
Saunders Waterford Rough - non mesh side
First painting on the non mesh side, a slightly smoother side. You can get smoother edges on this side and wet in wet tends to be more controllable.
Sanders Waterford Rough - Mesh Side
The rough side is the more normal side to paint on. The watermark in the paper will be on the correct side, so not show below any washes. This side is best for loose style painting. However in my experience, because of the mesh texture, when doing wet in wet you have to be very careful with your timing or some nasty edges appear where paint is creeping into the little troughs in the paper surface.
So it all depends on your painting sytle and what techniques you'll be using to best decide which side to use.