You're the first person I've run into who is 100% satisfied with the DMV. Which office do you use?
What is your interaction with the IRS and SS? (I haven't run into any problems giving them money, but that's all that I've done with them so I don't have useful data.)
I receive USPS mail for a different address at least twice a week. I haven't been burned yet by my mail being misdelivered, but odds are that I won't stay a lucky unicorn forever.
My most horrifying experiences were with the private sector (1) to clear up identity theft that happened to me, (2) admitted inaccurate billing by a dentist.