Since I do mostly wide cut hooking my favorite type of backing to use is primitive natural linen. I have used burlap, monks cloth, hairless linen and rug warp.
Burlap is not a favorite of mine because it is scratchy and too brittle for my liking.
Even tho it is soft, I do not like hairless linen because when I've purchased yardage of it and went to pull a thread to cut on the straight of grain the thread kept pulling apart and I chased down that same thread all across the width of the linen. And that was not a random event because it occurred every time I pulled a thread from either direction anywhere on the yardage. So I figured that if the fibers were so weak to tease easily apart then I did not want my hard work to go into a rug for the floor which would disintegrate before my eyes. I still have some left and will only use it for mats and something which will not get much use.
Monks cloth I don't like for a couple reasons. For one, my hook would aways get caught between the small threads that make up the weave and then I'd have to pull the hook out and cautiously insert hook again. Another issue is the cotton seems to stretch to much for me, I find myself packing too tighly and the rug won't lay flat; so didn't go back to using that either.
I have used rug warp and liked it....not as much as linen, but I really don't have anything bad to say about it. I hear all the time that rug warp is for fine cut; and so it may be, but I have successfully used an #8 cut to hook the rug you see below. Sorry I didn't take a picture inside before I sold it because it looks all washed out in the natural sunlight on my back deck.
So I know from personal experience that rug warp can be used with an #8 cut. Now, I use a Hartman hook which has a nice thick shank which aids in pulling wider loops thru backing easier. So perhaps the hook is part of the key to sucess.