I've been writing in Georgia ever since I read this:

http://fadtastic.net/2006/03/12/the-secret-lives-of-fonts/

A fan of Microsoft fonts, eh? You should move to Constantia, the new hotness in serifery.

Once you've read this, try this quiz: http://www.iliveonyourvisits.com/helvetica/

Arial or Helvetica?

Bonus round: what font is the header "arial or helvetica" set in?

Before the article: 2/10

After the article: 8/10

The easier way is to check the CSS file.