The Queen of Hearts has a very psychotic personality. All the residents of Wonderland are mad (insane) in some way, but the Queen of Hearts is the most dangerous of them all, by being the ruler of the land. She completely dominates her weak husband, the King of Hearts. She is also very egotistical, as she likes to hear the words "Yes, your majesty" and insists that "All ways are my ways!"
The Queen of Hearts is also shown to be a rather childish character, even in the face of Alice, as she is incredibly impatient, irrationally sensitive, prone to temper tantrums and, as stated above, rather egotistical.