Rose Tyler! Rose, Rose, Rose Rose Rose!
Why don't I like you? It's complicated, really.
For the record, it's not really you I don't like. I think you're an effective companion. Your chaviness, while occasionally annoying, can be quite endearing. You've got the most practical outfits for strenuous space and time activity of all the companions. I like your hair (even though it's fake :P). You made the Doctor better.
Of course, there was that time in School Reunion when you were so certain that the Doctor was yours and yours alone because you were the only girl he had ever picked up in 900 years. Frankly, your jealousy was borderline psychoti