Dear internets and its inhabitants: PC stands for personal computer. Windows computers and Macintosh computers are both PCs. The proper question to ask in such situations is "Windows or Mac?" This also gives room for Linux/BSD users to ***** about the lack of options.

As for me, ex-Microsoft (DOS 5.0 - Windows 2000), ex-Macintosh (System 7.5.5 - OS X 10.3.9, though I may pick up a Macbook at some point), currently Linux (Red Hat 6.2 - various versions of Debian and currently Ubuntu).