Both Ralph and Jack have traits of a leader.
1. Jack is already head choir boy when he comes to the island, but he is bossy and controlling with his choir boys. His dislike for Piggy is intense from the begining. He becomes more violent but he does understand the boys' need for food and rituals; he doesn't plan ahead or think out his his next move. He gives too much authority to Roger, causing the death of Piggy. His trying to kill Ralph might have eventually led to them all being burned to death ... No I don't want to be a Jack.Too violent, aggressive, impulsive, irrational.
2. Ralph is not only physically attractive, but he is charismatic, and athletic - what a boy should be like. Ralph seems to be a good leader, but it really is Piggy that tells Ralph what to do most of the time. It is Piggy that knows how to use the conch, how to create rules, etc. I feel very sorry for Ralph because he was just being his age. What more can you ask from someone his age?
Piggy would have made a better leader, but his weight, glasses, asthma and intelligence make him an outcast. Piggy is not an option. I choose Ralph; he represents the good in people. I would rather live with this belief in knowing right from wrong, and clinging to the idea that there is good in the world. I must have something to believe in. Hopefully if Ralph is the leader, he can still have back-up advisers such as Piggy.