Matthew's Journal

I say maybe because if you have any kind of equation-ish stuff in there then you'd be a loon to use anything else, but if you're just trying to produce text then it's more of a lifestyle choice than a necessity.

Linguistic examples can be treated as equations (at least by using the theorem enivironment) which I think has made my life much happier.

But then I write letters to the bank in LaTeX, which is definitely geeky.

Why? Once you are already using LaTeX, given how easy it is to produce a well-laid out letter using the letter class, it would seem incredibly silly not to use it for your formal letters. If you start using LaTeX purely to write letters to the bank, that might be geeky.