Lord Capulet is a very quick-tempered man. We see this both in his anger and calling for his long sword in the opening fight scene and also in his reaction to Juliet informing him that she has no intention of marrying Paris. In fact, the only time we see Lord Capulet manage his anger is when he is drunk at his own party. Lord Capulet seems concerned with only himself and how other perceive him.
Lady Capulet is likewise quick-tempered and concerned with outward appearances. We see this in her praise for Paris and her aversion to Romeo. And also like her husband, ultimately she sees her daughter as more of a burden and a responsibility than a loving member of her family.
We learn from the conversation between Romeo and Friar Lawrence that Romeo seems to fall in and out of love very quickly and very easily. Friar Lawrence is astonished that Romeo has forgotten his love Rosaline and this makes him initially question whether or not he should marry Romeo and Juliet.
In my opinion, Capulet is your typical angry controlling father. I like to think it's possible he is a drunk who after becoming rich cared for very little besides himself and maintaining his accounts.
I say this because in the beginning, he acts as if Juliet has a say in her choice to marry, but as the story moves on, he works really hard to make sure she marries Paris and tells her that she can hang, starve or die in the streets if she doesn't. I think he even gets abusive.
Lady Capulet is a typical rich woman who satisfies herself with prestige and social status. We see this as she encourages Juliet that a marriage to Paris would look good for the family. She actually does this beautifully in an extended metaphor comparing Paris to a book in Act I.
When Romeo talks to Friar Lawrence about marrying Juliet, we see that Friar Lawrence thinks Romeo has a girl problem. He worries that Romeo's motivation lies in his eyes, not in his heart when it comes to women. Thus, the difference is between lust and love. The Friar tries to distinguish this in Romeo but agrees to marry the two because of the potential benefit to the town's well-being if these two families can find a way to get along.