If/When this gets the ability to add custom sprites like clothes or new hair options gets added I bet this program will REALLY take off.
Oh sure pre set resources are nice and we have a wide variety of possibilities with what we're given BUT why settle for a mere drop when we could have vase boundless oceans of possibilities with the ability of setting up folders for custom bits and pieces to pull content from.
Like you provide a wonderful framework for people to play around with and if there was some sort of centralized resource people could post and share ohh neat clothes or say someone makes like 6-7 hair cuts or something... Others could use shared resources to swap around and inevitably grow the possibilities ENDLESSLY!