I just love, love, love Wallis paper. It is a hardy, resilient, forgiving and creative surface for pastel. The characteristic with which I have the most fun is the texture. It's fairly rough and accepts a great amount of pastel which means you can have just about as many layers as you want to try. But, because of the gritty surface you can create many different "looks" or textures. Rubbing in the pastel can give things a smooth look. Scumbling the pastel over the top (my personal favorite) gives a mottled look which I think makes things look like they have more form. It also gives you a chance to drag over the top of a beautiful color ANOTHER beautiful color giving it a rich look. In the painting above I did a lot of scumbling. You can see the deep green/blue underpainting showing through the pastel as well as the textured, multi-colored apple skin. If you like a loose, impressionistic look in your work I think you'd like working with Wallis.