As someone who likes fonts but doesn't know that much about them, I found this Slate piece on Helvetica absolutely fascinating. I know, sounds boring, but it's not. I notice fonts a lot, but Helvetica is so ubiquitous that I never really identify it when I see it everywhere. I love the story behind it, and the confirmation that Arial is literally a cut-rate alternative.
I also like that there's an anti-Comic-Sans movement out there. Shame about the merchandise, though. I understand the necessity of including the Comic Sans font on their shirts but that also makes designing an attractive shirt impossible. For me, the most aggravating thing about Comic Sans is that it doesn't actually look like comic lettering at all. It's an insult to comic lettering, is what it is; comic lettering as imagined by someone who hates comics and has never read one. The photo gallery is also amusing in light of the site's manifesto--the implicit criticism of every sign pictured is somehow hilarious.
Also, this site takes to task anachronistic typesetting in movies, something else I've occasionally noticed but never to this extent, with this amazing depth of expertise.