>>130226027>>130226257What's so good about Lois is that she doesn't just pair well with Clark as a love interest, but she is also perfectly suited to superhero stories in a way that other love interests are not.
Being not only a reporter, but Clark's co-worker and often times his competitor, there is no trouble getting Lois involved in almost any story. There is no need to invent a convoluted connection between her and the main plot - she is always right there in the middle of the action, because there is nothing more important to Lois than getting the story before anyone else, and getting it better than anyone else. She's not a character like Mary-Jane or Julie Madison, who is trapped in the b-story until it's time for her to get abducted by the villain, Lois looks for trouble and finds it.
And, best of all, and what I think is the key element to her long success - Lois is a damsel in distress through and through. Lois is tough and give as she gets, but she has never shied away from a knight in shining armor - in fact she usually expects Superman to rescue her no matter where she is. With Lois there is no need for her to prove her worth by rescuing herself or defeating the villain. She doesn't need to step on Superman's toes by saving the day - instead she complements him perfectly. She finds trouble, he solves it. She throws herself into a death trap situation, he gets her out of it. More than just a couple, Lois and Clark are a team like no other pair in comics.