Laura Roslin, "Battlestar Galactica"

Roslin is a character you root for despite her flaws, a woman made all the more three-dimensional by the fact that she does these things because she has to -- and she does them at the expense of her own soul. With every action she takes to protect humanity, she becomes less human and more like the machines she is trying to defeat. Lately, though, it seems like she might be on the road to redemption. Will it stick? Who knows? Wondering what that crazy Laura Roslin is going to do next is half the fun.
Mary Richards, "The Mary Tyler Moore Show"

WHY SHE RULES: "The Mary Tyler Moore Show," aside from being pretty damn funny, earns kudos for introducing one of the first female characters who truly functioned as an independent entity. Mary Richards wasn't anyone's wife or girlfriend or mother -- she was just a woman in her 30s trying to have a career and build a life for herself amid a never-ending stream of wacky neighbors, crazy potential boyfriends and hilariously bizarre co-workers. More often than not, Mary was the straight man, so to speak, the foil off which all the weirdness bounced but that also made her the rock. When everything else went phloo-ey, she was the one everyone held on to...even when clowns died and made people laugh so hard they nearly vomited. Truly groundbreaking, the character of Mary Richards paved the way for a lot of the fictional ladies we love today, including a certain neurotic resident of "30 Rock." Way to go, Mary Richards. No wonder she's got her own statue.
Dr. Jennifer Melfi, "The Sopranos"
WHY SHE RULES: First, let me just say that as much as I love "The Sopranos," I pretty much hate every single character on that show except for Silvio's hair and Dr. Jennifer Melfi, Tony Soprano's therapist, who time after time turns out to be way tougher than her whiny mobster patient. First poor Jennifer has to go on the lam because of Tony's shenanigans, then she gets raped and proves she's a much better person than I'd ever be by not letting Tony exact revenge on her assailant, then she has to spend time with her dumb-ass ex-husband who has the weirdest Italian fetish ever and then she's got to spend time with Peter Bogdonavitch - which, hello, how much torture can the woman endure? Worst of all, she has to endure the advances of Tony, who claimed he loved her and probably did in his own sick way, but what woman could handle all his wheezing and loud suits? (Although the loudness of the suits would probably drown out the wheezing...) No matter how many times Tony raged at her or tried to woo her, though, she stood up to him -- no small feat given that a) she kind of liked him and b) he's fucking scary! Melfi is a no-frills tough lady, one who holds her own against anyone and anything but without flash and flair. You gotta respect that.
Princess Leia, "Star Wars"

Read Part II here.