I regularly use Pyrocat-HD and FX-2, occasionally Windisch' compensating Pyrocatechin, and have in the past used DD-X, Ilfosol-S, D-76, Ultrafin, and Neofin Blue - and a few others.
For paper I have used Multigrade developer and Neutol WA, and now use Ansco 130, Gevaert G262, or Beutler's stock solutions.

As long as I mix my own I find it both easy and fun to experiment. Since I also have a fair idea of the differences between these chemicals, I can select the path that gives me the result I want with a minimum of hassle.

Mind you, I also use about 10 different papers as well as several "alternative" processes, all of which will give different results from the same negative.