Mine was/is SouthernTease because I was just starting to consider transitioning and Mane and Chic really helped me and gave useful information. It was also nice to see her progression through transitioning before I decided to take the plunge.
And I always have liked posts from people like Pokahontas, Eisani, Irresistible, Tiffers, JustKiya... I know I'm forgetting people. They always seem to answer questions and give good suggestions. I see them as the resident Aunties/Big Sisters of the hair forum. At least for newer ones like me.
ETA: And how could I forget to mention Sistaslick???? I used to print her articles out and read them like the bible. The things I learned from her helped me begin to undue 20 years of incorrect thinking, techniques, and products.