I was totally on Team Effie during the whole Effie/Tibby thing about Brian.
I loved the scene in the third book, when Lena's doing the sketch of her and she's fidgeting and she admits that she doesn't want Lena to leave because she'll be leaving her alone. Aw. And then the whole fight in the fourth book that leads to the ending, about how Lena is always taking the other girls' side and never her actual sister. And of course, the phone call from Greece, and Lena tells her she loves her and doesn't hang up until Effie calms down and says it back. Aw, I hope at least one of those scenes is in the movie!