I really love Drupal's content types. Whenever I build a new site, I have fun planning which information could be grouped into one content type. But nearly every time I encounter some "webpages", that won't fit - for different reasons. At first I want to discuss one of those reasons:
there is only one page of its kind
Examples:
front page, "About" page
Solutions:
a) WYSIWYG (everything in one textarea)
I could just use (for example) the Page content type and enable a WYSIWYG editor. Would work. But: I'd like to use the (CCK) fields features: at the About page, the author gets a field for an image, a field for an introduction, a field for a more specific introduction, …
b) 1 content type for 1 node
I could create a new content type (named "About"), create one node, remove create permission, and set up all fields used for that single About page I need. Would work.
But: It becomes a mess, when you have several of such "content types for single nodes".
c) 1 content type, several fieldgroups