Can I ask why exactly? I happen to be a dev (non-web), but honestly most big blog sites are a pretty bad experience. Full of ads, giant media banners, and irrelevant "related-articles" sections.

Sure, Github's repo interface probably isn't optimal, but it's not much worse than a minimal personal blog/template. And if you're not concerned with the dev pieces you've at least got the actual no-frills content right there in front of you.