One bit of feedback that we hear a lot is that there isn't enough variety in the fonts available in the Compose editor and blog themes. There's a technical reason behind this - if you use a special font on your blog that your readers don't have installed on their computers, they won't be able to see it.
That's a bummer, right? Luckily, services like TypeKit and Google Web Fonts can help you bring more exciting fonts to your blog. We have instructions for getting started with TypeKit in our Knowledge Base and this project will get you started with using Google Web Fonts.
The first step is to head over to the Google Web Fonts site and take a look at the fonts they have for use. There are nearly 400 available so you'll be there a while. Don't say we didn't warn you!