Are there any fields that are minimally geeky or outright ungeeky, and why are they like that?
Tamara: Retail and finance. In both cases, there's a rigid structure and you have your instructions. In retail, you're not allowed to get creative with strategies and techniques because your job is "You. Go do that." In finance, everything you do has to lead directly to the company making money. There's no long term thinking or placing a value on anything other than the impression of capital.
Steve: Nope, no such thing – YOU are what makes it geeky. Some just inherently have the synergy that makes it MORE geeky.
Ellen: I guess Geeks tend to be profound; they take interest in things that are applicable intellectually, creatively, and philosophically, and that challenge the imagination. RPGs are geeky because of the psychology and the real-world benefits of slapping on a different attitude, along with the ability to recognize imagining entire worlds, characters, and cultures without leaving the dinner table. Technology is geeky because it is always becoming more amazing, and changes the entire world in mind-blowing ways.

Serdar: If I work in a construction job and nobody there is a fan of Glee, but they're all "up" on construction from a creative, craftsman's POV, that's fine — that's the kind of geekery that matters for that work. What they do in their spare time isn't as important. If you have, say, one guy who also builds mini-dollhouses (because his precision carpentry work enables it) and the other folks at the job are enthralled by that, that would be great, too.
Scott: Off the top of my head, Marketing and Sales. Not that there can't be geeks in those fields, but Marketing and Sales focuses on manipulation, not exploration. Advertising is an odd exception – there's a creative element while trying to get noticed. Business might be another field that's minimally geeky. However, again, people in Business might be geeks, but the field tends to be mainstream. Accounting, however, has people who like playing with numbers – very geeky.