I happen to like the tone and contrast of Ilford PQ. But, as a liquid, it lacks a long shelf life. That drove me to more frequently use LPD powder mix. LPD is more or less similar in attributes to PQ but lasts 2 to 3x longer when mixed to stock solution in hard plastic bottles. Its results are more consistant (depending on through-put) than 130, an excellent developer.

I may be different but my real photo cost is time and not photo chemicals. I aim for consistant results so I use fresh developer. When I have not, I initially thought I had good results but discovered more sparkle when replacing the used developer.