Only a couple of behavioral things. (Because you can't just magically undo in one night what a year as a bear did to your psyche)
Mama bear instinct - Protective urges towards his kin. It's a lot less intense than it was as a bear but there's still lingerings of that protectiveness there, especially since he has a strong need for social contact now and his kin is his primary source of that.
Compulsion to bury kills - Mostly now goes in hand with his burrowing instinct and his desire for bones. Now he can dig up bones for later!
Lingering territorial instinct - He'll get over it eventually but for a while he'll still side eye anyone that enters his house... and also do a lot of chinning lmao.
Some remaining knowledge of plants - Mostly just which ones are safe and which ones are poisonous.
Sleep schedule - He's no longer nocturnal but his sleep schedule will take time to readjust.
Aversion to silver - Not exactly a holdover but after being weak to it for a year he's still going to avoid it for a while.
RETAINED FROM WEREBEAR