It’s actually a topic I’ve been asked about twice today so it is a timely find.
I’m no expert on design but my approach to choosing fonts is two fold:
1. Take on board the advice of designers – I’m lucky enough to be able to afford some quality designers to do my work – they usually make sense on issues such as font.
2. Keep it simple – one of my old teachers once gave me some advice that has stuck in my head with regard to font choice. She said that the best fonts are those that people are used to reading. People become familiar with fonts over time and learn to read them. When they’re confronted with one they’ve not see before that is quite different they tend to find it harder to read. While this might mean you end up choosing ‘boring’ or ‘normal’ fonts – it also means your readers don’t have to strain to read your blog.
Having said that – I’m not the guy to ask questions about with regards to fonts. If you’ve got some expertise (or even just a strongly felt opinion) on the topic have your say in comments.
Also interested to know – what font do you use (ProBlogger uses Arial Narrow)?