Hi all; my second love besides architecture is typography.
For the last two years I've been using Stone Sans II as the typeface in my architectural drawings and written correspondence. I use a combination of the light and regular fonts.
Though my colleague will murder me, I'm considering switching to a new typeface. I've been experimenting with Lintel (regular weight is free) but am looking at others as well, including some classics like DIN. One newer one that I've found is called Veotec that looks nice.
There are many freely available fonts to use that are of good quality (most older free fonts are junk.)
What typefaces do you use in your drawings? Would you mind posting some examples of how type is used in your work?