I really think the Fighter makes for the easiest playthrough, with the Ninja being second easiest. The Ninja also gives you the ability to hang back and not engage up front. So I guess I enjoy the Ninja most, because that's my typical play style. But I have to say, beating the game with the Priest can be very rewarding. She has one of the weaker attacks and once she can attack halfway across the screen, she actually hits pretty slowly. She probably has the lowest DPS of all the characters. But she has some good magic and is a nice challenge.