I'm going to second Dr. Quinn--it's really my mom's favorite show, but I really like watching it too (favorites are definitely the first two seasons, before they switched actresses for Colleen--the second one never felt like a pioneer girl to me--she didn't have the same "feel" and didn't click as well with the other characters, I thought).
But my favorite show would have to be The Pretender. I love the premise, and Jarod and Miss Parker are two awesomely complex characters. Unfortunately there's not as MUCH good fanfic as there is here, but there are a couple of really good authors and one that's simply amazing, so I do enjoy the fanfic there. Although I wish they'd finished the show off, there's been some great fanfic taking off from where it ends, since it leaves things so open, so that's always good.
