If you want to argue the merits of a particular typestyle or type technology, you might be better off posting to the comp.fonts newsgroup. Some people might feel that this sort of posting is inappropriate for comp.text.frame or the framers mailing list. It explains how FrameMaker handles fonts on different platforms. The company you work for or the customer you support may dictate the fonts you need to use. If you send your documents to a service bureau, they may dictate the typestyles they are licensed to use.
Most modern documents use sans serif type for headings and serif type for body text.
Please note that many people think that these two typefaces are over-used or are totally inappropriate and less readable than other typefaces. The choice is yours. The fonts you have available to you also depends upon the printer driver you're using. In Windows 3.1 and Windows 95, you may not have type 1 fonts installed, but if you select a PostScript printer driver, you may see the type 1 fonts resident in your printer show up in FrameMaker's menus and dialogs. You can format your text with these fonts, but what's happening is that FrameMaker is using another font installed on your system to display the text on screen.