the group I GM for has a bear barbarian. What's awesome is, mechanically, she's a half-orc... but in the actual campaign, she's an awakened bear. Like, literally. A cross between Chewbacca and Baloo from the jungle book, she named her bear "Chewbaloo", because obviously.
The thing about the class is... it's different than the barbarians in other editions. In those games, barbarians are huge damage dealers that are often fairly easy to take down in a few rounds due to low AC. In 5th, they still have the low AC... but they're tanks. And they don't deal a whole helluva lot of damage, not compared to other front liners. So, our bbn player, who normally plays the main damage dealer (it's what she likes doing) is having a rough time playing what is essentially the front line. She doesn't like taking damage too often... and so rarely uses reckless attack. Which can be problematic.
Ultimately, the bbn is a great class... just different from other editions.