I primarily shoot Piston WFTF. I come from a position shooting background, so I prefer shooting from position and figuring that stuff out. I have also shot Hunter Piston and Hunter PCP. I still dabble in the Hunter division, usually when I had enough of the piston gun for the year, when some health reason pops up, or just to give my PCP a chance to get shot. In comparison, Hunter PCP with a 20fpe gun is easy mode for me, and I prefer the challenges WFTF offers.
I don't expect to ever shoot in Open class. I figure if I want to shoot PCP from the ground like that, I will shoot PCP WFTF. I don't want/need the supports that Open offers, and whatever I learn from shooting PCP WFTF can be good training to improve my Piston WFTF game. I have certainly considered shooting PCP WFTF, but have yet to source the equipment I think is necessary to make it work for me.