Mayim Bialik (aka Dr. Amy Farrah Fowler on television's popular "The Big Bang Theory") not only plays a geek, she IS one. Best known for her leading roll in the 90s family hit, "Blossom" and the young Bette Midler in "Beaches," she's a real-life neurobiologist who holds a Doctorate of Philosophy in Neuroscience from UCLA.
Just as Hannah herself resists typical far-fetched sitcom stereotypes -- she's not model thin, she struggles with her finances and her career choices-- her OCD symptoms are presented in a way that resists the low-hanging fruit of a kooky character most of us never encounter in our day-to-day routine.
If this were school, the girls of "Girls" would be failing. But it's life, so it's even more depressing. We're already eight episodes in to Season 2, and the girls' togetherness scores have only decreased. Hannah's suffering from OCD, Marnie is desperately following Charlie around Manhattan, Shoshanna is hooking up with doormen, and Jessa is missing.