I am also a convert to PBT keycaps. Ducky Shine caps are the only caps I prefer that are not PBT. But otherwise, I like thin and thick PBT--depending on the switch type, because of the profile difference. The dry powdery feel is very pleasant, and of course the resistance to shine is nice on the cosmetic side. I still appreciate and want ABS caps when they are in nice-looking sets, but wish they were made of PBT instead.
I have tried thick GMK doubleshots on modifiers, SP's thin doubleshots, old WYSE caps, various Filco caps, Ducky Shine caps, thin PBT caps (OEM profile), a set of thick dye sub Vortex PBT caps (Cherry profile), zinc keycaps, and aluminum spacebars.