*nix vs. Windows
Vi vs. Emacs
Perl vs. Python
Gnome vs. KDE
Big Endian vs. Little Endian
K&R vs. Allman
Tabs vs. Spaces
Cuddled vs. Uncuddled
Static vs. Dynamic
Mark-and-Sweep vs. Refcounting
$language is really OO vs. No, it isn't
...waged against the authors of polls with too few choices.