Fluff and Crunch have been in the topics lately so I will quickly address them myself. A balance of Crunch and Fluff is very difficult to maintain, some books need more crunch then others. A CORE book or something meant to hit home for any audience(I.E. Challenges, Strongholds, MoTP, The Class books, Core Books, etc) need mostly crunch(80% maybe as a rough estimate) because the Fluff should give you enough idea of what the Crunch should be doing and get you along your merry way.
Now on the other side of the coin, books like FRCS, Magic of Faerun, Kalamar Campaign Setting, Ghelsped CS, etc. need far more fluff then a more "Core" book. These books are meant to describe stories to the reader. You are picking them up to see what a few guys who are intimately familiar with their land wants to do with it and you use their Fluff to make new Fluff of your own.
An example of too much Crunch and not enough Fluff is Faiths and Pantheons, essentially all the deities of the Realms in a book. Now I wanted more on how different gods interact with each other, their elite champions(ala Prestige classes), and some smaller deities. I got some of that, but I really wanted more on how they interacted with each other and possibly some history on how the pantheon is the way it is(Times of Trouble info would have been nice as a bunch of gods died and lost portfolios). Instead, I got stat blocks of the GODS, I find that totally useless...unless you want PCs fighting the gods. Now, the stat blocks are Crunchy but are an example of bad Crunch.
So, I guess overall, to please everyone is impossible
Gariig
Now on the other side of the coin, books like FRCS, Magic of Faerun, Kalamar Campaign Setting, Ghelsped CS, etc. need far more fluff then a more "Core" book. These books are meant to describe stories to the reader. You are picking them up to see what a few guys who are intimately familiar with their land wants to do with it and you use their Fluff to make new Fluff of your own.
An example of too much Crunch and not enough Fluff is Faiths and Pantheons, essentially all the deities of the Realms in a book. Now I wanted more on how different gods interact with each other, their elite champions(ala Prestige classes), and some smaller deities. I got some of that, but I really wanted more on how they interacted with each other and possibly some history on how the pantheon is the way it is(Times of Trouble info would have been nice as a bunch of gods died and lost portfolios). Instead, I got stat blocks of the GODS, I find that totally useless...unless you want PCs fighting the gods. Now, the stat blocks are Crunchy but are an example of bad Crunch.
So, I guess overall, to please everyone is impossible

Gariig