I can't stand Q and I only don't mind him in the one episode where another Q is thinking about suicide. And I like that other Q far more, and the episode would be stronger without the first Q. I also dislike Khan. Neelix would be a fine character if he didn't have a 3-year-old girlfriend he was obsessed with. Kes was a good character too except for her unhealthy relationship. The only Star Trek characters I can think of who annoy me are Q and Quark.