I am a firm pyromaniac. My main films are FP4 HP5 and now Classic Pan 200. But they are not avilable as Readyloads
My main developer was XTOL, but changed when Kodak dumped the 1 liter pack. I never experienced the dreaded XTOL failure, but 5 liters is way too much developer to have sitting around. So experimented with TMX and a bunch of developers including Pyro, D76, Rodinal, DDX, D23 and settled on D23 1:1.