So, I've been stuck trying to decide which characters to use as sculpting practice, partly because I'd first need to draw a model sheet, but also because there are so many options to pick from. Some are from my regular cast, while others are bits of fan art I could have fun with. A couple (duck, monkey) are one-off ideas that I otherwise don't have any place for.
There are some caveats - until I have a base figure blocked in, I'll mostly be doing head sculpts. Some of the anthro characters - Country Bears, America Sings - I'd also either need to figure out how to imply fur/feathers, or how to do fur cards.
Also, busty characters like Mimi... As far as I'm aware, in Zbrush there's no way to prevent two surfaces from fusing together if they touch. Mimi's breasts are very likely to fuse together in the middle, and with her stomach.
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* large breasts can get fused together in Zbrush, and to any other part they touch.
** a model already exists. It may be severely out of date, but it exists.
*** rough concept