To pay tribute and discuss every aspect of the TV show. Use spoilers accordingly.
I started watching GoT a couple of months ago after being pursuaded too by @GatoRage; I've since become a big fan and watched both seasons. My favorite character is Jon because he's sweet and has the most interesting storyline. I also die of handsome everytime I see him. Personality wise, Tyrion is the wittiest and funniest character and he's pretty handsome too, not like the books make him out to be :I
The character I dislike the most is probably Cat, the way she treated Jon and her constant hagged, worrysome face just annoys me. I also hated her for kidnapping Tyrion. There's nothing redeeming about her but I suppose it's good to have a mix of characters you like and characters you don't.