Beerus is powerful, yet lazy and playful too. His similarities to cat-like behavior also display in his love for long sleep sessions and how he grooms himself. Beerus is always in a bad mood when he wakes up from his deep slumber, but becomes less grumpy the more awake he is. Similar to many cats, he likes to display dominance, and will claim whatever he desires to have without much consideration for how it will affect others.

(Go for Jason Douglas' interpretation, but your own spin wouldn't hurt. All up to you.)