I go for the creamier toned from pure white matte if I have a warm toned paper, and the matting suits the image.

I printed an image from the last of one of my Ektalure packets and developed to in warm (like 76F) Ansco 130 over the holdays. It dd not fit with an all white matte well at all.

I do find some images work well in a black matte, but it varies.