It would be nice if in the future there was an option for joint ownership of characters between multiple users. My wife and I have several characters that we have collaborated on that we're somewhat at a loss for how to divide up for posting on toyhou.se. I'm sure there are many others out there who have creatures, characters, or species that are a collaborative effort, and it would be nice to have an easy way for those users to have those characters attributed to them.
This is definitely something that I'd like to see. My SO and I have A LOT of shared characters, which stumped us pretty hard until we just decided that I'd post them to mine (even if he controls certain ones). So having a joint option would be nice.