Many years ago I collaborated with Keith "Eberron" Baker and Neal "He's good, but unfortunately you probably haven't heard of him" Gamache on a book called The Complete Guide to Beholders. This was before Eberron, when we just called him Keith "Daddy Smackdown The Hammer" Baker. Ask him sometime.
Anyway, I was thumbing through one of my comp copies last night. Keith wrote most of it and Neal wrote most of the rest; perhaps my longest single contribution was Chapter 7: Beholder Architecture.
I don't like maps and I don't much use battlemats and I don't like 4e D&D because of the emphasis on Specific Physical Locations. But I can write 9 straight pages of descriptive text about different kinds of beholder lairs -- how they're laid out, how they're used, what they mean. That says something about the kind of roleplayer I am. Dunno what, but something.
Luckily, someone who can do cartography made some nice maps based on my descriptions. I'l credit them by name next time I have the book handy.