> most personal blogs make you look like an idiot That depends on what kind of blog we're talking about. If it's someone's Tumblr where they're posting selfies

> most personal blogs make you look like an idiot That depends on what kind of blog we're talking about. If it's someone's Tumblr where they're posting selfies, concert photos, and "deep thoughts", that's one thing. But it's certainly possible to have your front-facing, top-level-domain, professional blog showing off your work and getting you jobs.