Most of the factions that are alive will have some of their active members reporting there.
And that's pretty true what NerdRage said. It seems that Rheinland is pretty quiet but as at least in Hessian character it's you who create the opportunities. It one of those faction that have plethora of things they are supposed to be doing. And rather large ZOI for an unlawful faction. Things have been a bit quiet on the Hessian front. But the good thing about the Rheinland is that if there are fewer players the RP has more potential to be very satisfying and lengthy with fewer people to interrupt.
Personally I find Liberty a bit too hectic to my taste. You always run a constant risk of someone interfering your RP with a person you are talking right now. In NY there are a lot of opportunities for RP, but there's nothing to be done, and is not really unlawful's or lawful's fault who are RPing, if someone barges in despite the protests of usually both parties.