I've been ignoring something for way too long, so if you'll excuse the slight tangent I have a question: What do bloggers mean when they say "challenging"? Am

I've been ignoring something for way too long, so if you'll excuse the slight tangent I have a question: What do bloggers mean when they say "challenging"? Am I missing something, or is "challenging" just pretentious-blogger speak for things that make them want to turn their brains to "think about something for a bit" mode instead of living life on autopilot?