Congratulations! It sounds like you've landed somewhere really good.
Thank you for reminding us not to give up. A lot of your story sounded familiar, although you were way more persistent than I was. I'm 33, and recently got rejected from two different bay area "dream job" companies after making it through several phone rounds in order to fly out for in-person interviews. The more recent of which, I got nervous the night before and only got three hours of sleep. The hardest part of that rejection was wondering "what if" I had been just a little bit sharper.
After the second rejection, I accepted a position with a small defense contractor near my home in Washington DC. The bureaucracy and mindless restriction are sources of endless frustration. The combination of billing by the hour and a long commute leave very little time and energy for keeping up the job search.
Reading your story reminds me I have very little to complain about. Thank you for posting. I'll use some of this time off to send out some more applications. Hope you have a great Christmas and good luck once the new job starts!