Wichita State University has completed a study (too much free time, Wichita State?) which found that the font a person chooses sends a strong message about someone's personality.
Courier (and other mono-spaced fonts)implies dullness and lack of imagination.
Georgia and Times New Roman are associated with stability, maturity and formality.
People who chose Arial or Verdana (or other sans-Serif typefaces) were seen as professionals who wanted their readers to concentrate on content rather than personality.
When I first started blogging, I used Arial a lot,and then I got tired of it and now I alternate among Trebuchet, Times and sometimes Verdana, but only the small font size. Do not ask me why.
What font do you use most? Why did you chose that one?
And perhaps more tellingly, what font are you? Apparently I am Arial, and the quiz accused me of being normal. Who are you going to believe? Me or some quiz you've never even met?