If you like Arya, then you should like Sansa too, as they're closer to the same product of their parents than people recognize. Sansa's desire is to be the epitome of a lady as much as Arya wants to be the ultimate warrior.
There is one thing Sansa sucks for doing, and that is not backing Arya with the truth in front of Robert.
However after the incident where she lost Lady, Cersei made sure that Joffery started acting reformed. It would have taken more work, but Arya could have been deceived too if confronted directly and consistently with Joffery's period of dishonest charm and contrition. If we're talking about seeing what's there and not what we want to see, Sansa was the one who was direct in pointing out the striking failure of a king that Robert had become, which Ned and Arya had difficulty seeing in separation from his grand exploits in battle. Anyway, since the Joffery Sansa was dealing with wasn't the one that everyone else knew, of course she had no logical reason to want to go back home. How could King's Landing be dangerous when your father is the Hand and your boyfriend is heir to the throne? She wasn't being anymore naive than her father in the face of Lannister deception, but no one hates Ned for being naive. Also, Arya was acting just as spoiled and selfish demanding they take Syrio with them. What if he couldn't go? Bran was a cripple, Jon was at the wall, and Nymeria, her direwolf, was gone, so it isn't like there was a great time waiting Winterfell when she got back. And, Arya had shown more propensity for disobedience so who knows what she would have done to inadvertently endanger everyone to get her own way. In terms of "willing to screw her family", if you're referring to what she did in the books take it to the other
thread.
http://www.neogaf.com/forum/showthread.php?t=466883&page=70 Going just by the show, all Sansa did when confronted by Cersei is write a note to Robb and beg mercy for Ned's treachery in front the court. If you were told that would save your father's life and send to him to be with your uncle and half brother, I'm sure you'd take it. Also it was Robert's idea to for the marriage. And, as far as the sacrifice goes, I'm convinced she was going to kill Joffery whatever the consequences. The Hound stepped in, so the blame there rests with him.
Ya, she is hopelessly lost in her dreams, but only as long as she feels she is in the safe aegis of her families power. Her mother, father, and the people who have surrounded her telling her stories of romance as she's grown up refuse to show her the cold realities of the world, and in a way things really aren't different for Arya. Arya just likes the stories of female warriors instead of female nobles. Once her father is in a dungeon and his men are all killed, she is thrown into a shocking reality. Maybe if Cat had allowed Ned to do more stuff like possibly take her with Arya and Bran to the execution at the beginning you could say she should have been able to get her head out of the clouds, and have a better sense of peril when Ned tells them to leave.
