I'm a total acrylic junkie, because most of the things I make are going to be washed and not washed with care. Or because I'm doing amigrumi, and I want tight stitches. Oh, and I am cheap!
Kwyj, have you checked out the Best Examples of Acrylic Awesomeness page on ravelry? There are some gorgeous things on there. I look at it every time I go on Ravelry.