I wasn't RPing then, either, so I don't know what it was like. Apparently, it devolved into fights and drama, or something, indicating that if a plot or other defining structure isn't present and everyone is left to their own devices with no checks and balances in place, then the RP becomes a problem.
Well from what I can remember...
-Archer (Roa/Ruri/whatever) had a story arc where he went crazy and evil and [parasitic bomb], god sue mode and such. Some people (Flame especially) hated this.
-Some people had too many characters.
-I was [parasitic bomb] and attempted to turn the story over to my favor far too many times.
-LOTS of fighting and anger, sort of like what happened with MCH in Wilypocalypse.
-In the sequel (Busier World), I went far overboard with the PSG stuff, and I pissed people off more.
-Everything was a confusing mess.
-Hell if I remember correctly the RPMVania RP spun off from people who wanted to do castlevania without doing it in the Busier World stuff, and that one actually ended!
So yeah, not that I wouldn't want an Animal Crossing RP, but we'd need to set some ground rules and at least some sort of story parameters.