I like a good quality linen and prefer cashel. Right now Im working on aida cloth and am finding its starting to pill up. So it will have to be shaved. :( I also like hand dyed fabrics and have quite a few in my stash.......... just not enough time to get to them all!
I actually like to use them all depending on the project. I dont really have a favorite because I think for me there is always the "best" fabric for my project. :)
Good topic for discussion though, it is always interesting (for me) to see how others feel.:)