My post was purely a response to a comment about 3e stat blocks.
But, if you want to talk about fluff, I am a fan of sparser fluff. Skimming through the 3e FRCS my take is that the word count is about four times what it needs to be to convey the information. I don't need long prose, in fact I don't want long prose because I'm not reading for entertainment I'm reading to prepare for a game. (Ed Greenwood is not Herman Melville.).
(For the opposite approach, check out The Secrets of Skyhorn Lighthouse and The Corruption of Skyhorn Lighthouse, by Kelsey Dionne, on DMs Guild. I recently downloaded them and love the format; rarely am I ready to run an adventure with as little reading.)
EDIT: To make my point a little more clear, I'm talking about taking something like this:
Sewer halflings are a peculiar sub-branch of halflings, which some sages say are distantly related to Lightfoots, although this theory has never been confirmed. The timid Sewer halflings reside in the extensive sewers of cities like Luskan and Waterdeep, although there have been sightings in smaller cities throughout the Realms. As one would expect from creatures that reside in the sewers, sewer halflings are filthy. They can be useful allies, however, for they are inveterate hoarders and consequently can be a....blah blah blah
And condensing it to:
Sewer Halflings (timid, filthy, hoarders)
Location: Luskan, Waterdeep