I started my blog after I took a severance package (aka was laid off) from AOL back in 2007. I had a 6 month payout and took my time job-hunting (the economy was doing just fine back then). So I was rather picky about what jobs I'd interview for, and was definitely picky about what I'd accept.
And truthfully, I become bored. My friends and family kept asking me how the job hunt was going, what companies was I interview with, etc. So I decided to kill two birds with one stone, so to speak. I created a blog to entertain everyone and keep them updated, and it gave me something creative to do after hours of sending out resumes and taking the same interview call over and over again. So I become a blogger out of necessity and boredom.