@Justin Tadlock - Agreed. Context is key.

For example, last week at WordCamp Philly Jason Coleman developed a plugin during the event called Don't Break the Code. It allows for disabling of the visual editor on a post by post basis. In a discussion about how to go about the plugin, instead of adding another metabox to the posting screen, it was decided that moving the controls to the Screen Options would make more sense.

So, the plugin avoided adding yet another metabox to the screen, and moved the controls to a place that people look to make changes to the way WordPress screens operate. Win win.