@LindseyBonnette My favorite by far is #TTRPG reviews, or discussions of books generally even if it's just a nostalgic "Why this book rocked my world 7 years ago" type thing.
After that it's definitely technique articles, whether for GMing or designing or related craft like map drawing or producing player handouts.
After that, other forms of directly-usable resource. A listicle of 15 historical poisons, frex.
Then, stories of notable table moments, often with reflections on lessons learned.