why does gulliver keep travelling despite his misfortune

Much like the original philosophers and explorers of olden ages, the quest for Utopia or the ideal state was something that everyone desired. Same was the case with Gulliver, as he too wanted to look for a perfect state of being; a state which he found in the land of the Houyhnhnms. Once he reached their land, he did not want to return back or journey any further, hence one can assert that the land of the Houyhnhnms was where Gulliver's quest ended; a quest that made him travel again and again despite the misfortunes that every journey brought with it.