I voted once by absentee ballot in the USAF, what a pain with the paper and signatures involved (I was working trick work, mids, swing, days, trying to get signatures from day shop officers)... today Florida has mail in (and early voting) which is convenient, but the Red people don't get any campaign material out prior to a lot of mail in votes...
downside....in the primary for 2016, I cast a ballot for the Pediatric Neuro Surgeon, before he withdrew from the race...