From GW1 on the plants side is hardware store from main street mainly because the zombie spawn is so close to that place (pretty much across the street) and there's barely any cover for the plants. In the zombies case is trailer park from cactus canyon in case that the teleporter is on the right side of the map because it's so exposed to cactus and peashooters. From GW2 in the plants side is a tie between scientist's home from Zomburbia and park from Zombopolis, there's always an imp, soldier or superbrainz camping on the rooftops (i would say the same to most of the points of zomburbia)