I think everyone has their own reasons to ship Jack and Kate, and here are mine :)
8.) Verbal Copulation Pretty much everything Jack and Kate say to each other defines why I 爱情 them. Since Season 1 their love/hate conversations were the main reason I wanted them to end up together. From funny quotes: "Being told not to come along. Now 你 know what it feels like to be me." "Does that mean I should wait 20 分钟 and go anyway?" "Touche!" To angst quotes: "Goodbye, Jack." "We have to go back, Kate!" Jack and Kate are arguably the couple on 迷失 with the best dialogue.