Chat is okay with me but more people will probably want to participate in a forum thread. Also it might be difficult to get enough people to be available at the same time in a chat, and especially with DID where it's often impossible for alters/parts to front at will. Not sure about my parts but they don't let me know when they're fronting and it seems I usually am spaced out and don't really notice when it happens unless there's something obvious like if they take a picture on my phone.