While I haven't seen boars or polar bears yet in the latest version (v0.8), if they're as amazingly detailed as the deer I saw in the mountains yesterday, then I look forward to encountering both of them. Even if I have to be chased by them while in awe. But I wanted to put in my five cents for future fauna and flora suggestions.
The beaches need your attention. They are devoid of animals except those who happen to occasionally wander there.
I'm sure birds will one day take flight in Rising World, and when that happens, I don't know how long after that before we get carpet-bombed by them, but even if they can't take flight right away, it would be interesting to see sea gulls or piling plovers on the beach. Or pelicans, terns, crabs, lobster, seals, and sea turtles, for that matter. Maybe even a frog, but it would do better in a bog biome along with crocodiles, which is a topic for a future date. And we already have penguins, but they're enjoying the snowy biomes.
On the flora side of things, we already have palm trees, so it would be nice to one day add coconuts to them. The beaches could also have bayhops (railroad vines). There is already tall grass and stony terrain on occasional spots on the beaches, so they're already covered. Plus the rarer red seaweed that sometimes grows outside of the water.
That said, an old shipwreck on the beach would make for both an interesting "dungeon" and a way to liven up the beaches. Crates and chests could be found in their hulls with some worthwhile holdings of their own. Maybe it was a slaver ship and some of the dead slaves' skeletal remains come to life to attack us. Or maybe it's the dead crew that attacks us. So many possibilities.
This is a spur of the moment thought/rambling, so I would invite anyone with additional ideas for the beaches to add them to this thread.