Linux, Windows, or Mac?

Point sizes vary due to DPI. I used 11pt on Windows, and ProFont (bitmap, 10 or 9, I don't recall) on Mac.

I think it's only Windows where you can get relatively decent clarity for aliased fonts at a smallish point size, depending on how good it's hinted, due to how ClearType renders it.

Mac is a bit heavy, and Linux is just bad, the shapes on Linux look nothing like any other OS.

Aside: Yes, I know about the byte code interpreter option and patches to FreeType, but even with that it's still bad. Most programmers I work with unfortunately are just type blind (can't tell difference between Tahoma, Arial, and Segoe, and italic/non-italic of each, for example, leading to "interesting" font choices in UIs).