Robbert Raets
Explorer
I'm sorry if this comes off as an unnecessary rant, but all the 'let's jump on the bash Eberron bandwagon' posts I've been seeing in the past hour are getting to me.
The Eberron Campaign setting is one of the best and well-balanced books Wizards has brought in years.
In my opinion, the three core rulebooks are not unlike a toolkit. Screwdrivers, electric drill, number of hammers, the works (what you build your imaginary world with).
Continuing with that analogy, I must then deem the Living Greyhawk Gazetteer a extra set of screwdrivers of irregular sizes (to fine-tune your view of the 'default' campaign world).
In comparison, the Forgotten Realms Campaign Setting and it's supplements are a number of tools with the instruction 'use this, that & that from your regular toolkit, but substitute these new & better tools, which have prettier colours, too (new/expanded rules (aka 'crunch') and flavour/fluff, respectively).
The Expanded Psionics Handbook, then, is a set of extra batteries & wierd-shaped power drill components, along with some nonstandard screwdrivers (alternate 'magic' rules & ideas).
The point I am now coming to, is thus that Eberron is a sentient toolbox with a really cool custom paint job that helps you pick out the right tool for the job. It gives you options, more than it gives you rules (more screwdrivers/components) or statistics ('a size 4 wrench is recommended/used by experts').
I hope that wasn't too confusing....