I usually only join a PF group when someone asks me to. I don't really open the PF and go looking for groups really. Mostly it's because we do the more challenging stuff with the FC on set days.

However, when I do join a PF group, I usually stick around even after wipe after wipe, and even if I already cleared it myself.

I have noticed I don't get asked that often these days though, I guess people prefer to put up a learning/clear party on PF, and then just wait for it to fill up, rather than actively find people.