Ive had a bear swim past me while i was in a small metal john boat. Pretty neat. But bears shouldn't be able to board boats or rafts... they might theoretically be able to get the leverage to pull themselves up on a raft but they'd never even get their paws up over the gunwhale on a raft, they'd just sink.
It would be cool to see some animals that really take a group effort to kill tho. And some animals with better loot

These trolls look aboreal what with the all green suntan but it'd be neat to see them as rare cave spawning creatures (have spawns randomly appear in a small percentage of caves so that a few will always have one roaming, then when you kill that one the spawn moves) that are super aggressive but also have really high q bones and teeth and meat if you kill them. Or, even neater, have them as sort of NPCs, but all they do is run around eating people and then when you kill them you can cut open their gut and get all the armor and weapons and such off of the people they've eaten
