If not for an HN "Who's hiring" post I'd probably still have my safe job writing internal apps for an insurance company in Albuquerque; instead I'm back living in beautiful San Diego (my favorite city) and I get to see the ocean every day on my drive to my current awesome job. So add me to the list of people for whom HN changed their life. :)
It was that it was in San Diego doing Java at a company doing cutting edge wireless stuff with their own hardware. San Diego + Java + doing something new == whoohoo! :)