I don't use them often. Only if the base has a really cool pose. It's basically a picture of a Sonic character style body without the face/clothes/markings etc, which are drawn on вверх of it by the person using the base. If Ты can, give credit back to the person who made the base and if possible a link to the finished product.
i use bases i only use them cause they all have great looks and sometimes i do furry doll maker like what BCthestrongerest сказал(-а) i found one and used them to do this there bro and sis theres names are rye and lilly