Honestly, I loved everybody in the main cast. I liked Jack at first, but he - at least to me - got so irritating over the series' run. My instant favorites are: Kate, Sun, Sayid, Charlie, Shannon, Boone, Claire and eventually Jin and Sawyer as the series progressed. I was never too fond of John Locke; his constant talk of the Flight 815 survivors being brought to the Island as their destiny as well as other stuff involving fate drove me crazy. Don't get me wrong, there; I loved how the series brought in the concept of fate vs. free will. Regarding other characters, I like Juliet, Danielle, Alex and Ben. However, I only began to like Ben in later seasons when he became a better man.