I should probably be kept an eye on, otherwise before you know it I'll start posting Thoughts on Doma. We'll see how long before people notice that Charles has been replaced by a duly elected representative of the Mind Flayers.
Anyhow, on with the thoughts.
I tend to see orks as a nomadic culture, with permanent settlements being a matter of convenience for trading, and very much the exception. Hence, I rather suspect Gwa'Aag occupies a larger area than the distinctly weedy territory shown on the map.
Whatever source you go by, orks are a warrior culture, and tend towards rule by the strongest. Which isn't to say that the weak don't have their place. If anything, they're even more motivated to claw out a position of at least moderate respect and tenaciously defend it against all comers.
While violent, orks are not necessarily evil. Sure they'll duff ya over and take ya stuff, but they won't gripe about it if you do the same to them. There's no glory to be found in beating up an obviously weaker opponent, so one-sided slaughters aren't all that common.
One of the things I like about Gaeran drow is that they've got a small, neatly defined pantheon of their own. I'd like to see something similar for the orks. Even if they're not overly religious in their day to day lives, a culture's pantheon says a good deal about it. My personal picks are the following gods for a nice round figure of three:
Numian - God of battle and possibly, according to some sources, creator of the orks. Numian embodies the typical orkish mindset to a great degree. Formal worship of Numian is rare, but any good scrap (of which there are many) could be construed as a form of worship.
Kazeros - God of freedom. At first glance, an outsider might be confused at Kazeros' position in the ork pantheon, but as a nomadic people with a loose hierarchy at best, personal freedom is an important part of orkish culture.
Loki - God of trickery and, let's face it, the odd god out in the pantheon. While brute strength tends to rule in ork society, there are also those who get their way through low cunning. And who better to serve as the patron of such underdogs than Loki? If nothing else, Loki serves as an important balance for Numian.
And that ought to do for now. I open the floor to comments. <p>Centuries of threats of "I'll turn you all to stone!" and "I'll knock you all down!" have caused Domans to develop an instinct to form small groups. For safety, I assure you. – Keir</p>