I am just a collector, but speaking from a collector's point of view, I say you should go for it. Maybe present a couple of new pieces at the same time that you present your signature bears. That way, collectors who prefer your current pieces won't become alarmed and think you are completely changing, but collectors that are ready to move on and experience new ideas with you have that option. Speaking for myself, my bear collection is extremely varied, ranging from traditional bears to very different. I don't currently have any of your current bears and would love to own one someday, but would be equally excited to see what else can come from your imagination!