The narrowness I'm thinking of is stuff like "Jack-Of-All-Trades: Fax Celestis' Guide to Spellthieves" and the "Writer's Quotes" of the people who work on the Exalted RPG. And other stuff that's interesting if you share one particular, exact hobby, but not outside it.

To use D&D as an example, I'd post a general discussion of gaming, a discussion of D&D stuff relating to real life, or a discussion that seemed like it'd be interesting to non-D&Ders, but not something that assumed a given level of knowledge, and was not interesting without that.