Which bears are the best bears?

It really depends what you mean by "best."  If you prefer smaller, less aggressive bears then black bears are best.  If you like big, ferocious bears that live in the mountains, then grizzly bears are the best bears.  If you like bears that are big, ferocious and live in arctic conditions, then polar bears are the best bears.  If you prefer cuddly bears, then a teddy bear is the best bear.