Stannis's storyline is quite interesting thus far, I find his character is actually quite compelling. But Bran, and his story line, are terribly boring I find even when it was that critical moment at the end of the first episode that got me hooked. One of my friends often go "Ugh, another Bran chapter".
Jon Snow was was great in opener. I really want to see how his character develops, not to mention Ygritte as well.