In the words of Geoffrey Ase "One reason for their becoming popular was that they appealed to a wide variety of interests, in an age when there wasn't much in the way of imaginative fiction" The arthurian story have magic, fantasy, religion, drama, comedy and different topics that are appealing for almost everyone. The success of this epic story is its timing release, the wide topics that covers and that it is an easy reading for people of all ages.
The first sentence, ‘My cat’s favorite pastime seems to be sleeping’. A gerund is when a vets is used as a noun. Future tip: gerunds most always end in ‘ing’. Hope this helps.