I think pride is a big role in Beatrice's life and also a big motivation as well. I think that because through out the movie she constantly denies her love and all the affection she has towards Benadick. Another motivation i think that she has is her family, i believe that her family motivates to strive for better in life and to make them proud of her. As the quote "I wonder that you will still be talking, Signior Benedick, nobody marks you." This proofs that she strongly dislikes him , which is only her public opinion about him because they broke up and she hates him and her pride is so strong that she feels the need that every time he's around she has to say something rude to or about him.
Beatrice had a huge change throughout the whole story. In the begging of the story and mostly throughout it; it shows that she's a very mean women with an attitude, but that's all because Benedick is present at the moment. At first she starts off by hating him. She's always hating on him it's almost like a daily basis. "Scratching could not make it worse an 'twerp such a face as yours were." This quote is from the begging of the story which i took from one of her many arguments with Benedick. Right there she's telling him that his face can't get any more scratched and if it did it wouldn't make no difference because of how ugly he is. As the story goes by her opinion on him changes for completely, she starts catching feeling but she still doesn't admit it because of her pride. At the end she does end up marrying each other. "I would not deny you, but by this good day, i yield upon great persuasion, and partly to save your life, for i was told you were in a consumption." That shows her how much it changed .