When I was a kid my budgie Dobbie was a mean little turd but the worst bite was a goose bite!! I remember getting into our neighbors chicken coop which was full of chickens, ducks, geese. I big goose started chasing me and I couldn't run my boots were stuck in the mud and they go for the back of the knees!!!
I've only handled birds in stores but have never been bitten. One reason I am getting linnies is they are less prone to be nippy like other small parrots like budgies and love birds. I know my boys are just babies but I don't think we will have much problems. Just from the look of their little beaks and their fiesty attitude, love birds look like they would be the worst! They are the only birds at petstores I am usually worried about handling.