There are so many amazing blogs out there already, I felt I needed a place to keep track of the best of the best. Hungry Gamer is blog I do where I link to lots of incredible articles on games and game design with quotes and commentary. I also recently started a video podcast about my own struggles and successes with game design where I document a two-week sprint of work, then go back and see what worked and what didn't. It's 100% for developers, both new and experienced, so I hope you guys will check it out!
I'll also be checking out all of these amazing blogs. Thanks for asking this question! Lots of amazing information here.