Ruby I am sure you know that when flying, TSA and airlines are required to allow a medical device on board with you as a third piece of luggage, not to count against your 2-item max, and requiring you to "check" it is absolutely not okay. A couple of years ago I thought I saw something on the TSA website that one could print out and show the TSA agents but when I went back just recently in anticipation of a trip of my own, when I searched "CPAP" all I got was info on oxygen.
Getting over the whole "I'm no longer attractive to my bedpartner" does take a little doing, but I have friends whose partners are relieved about the mask because (1) the reduction in snoring is so helpful, and (2) they know it's a health issue and they would like to keep their bedmate around a while :-) Granted, there are partnerships where one or both are uncommunicative, but then the issues are far greater than a simple CPAP. Personally I loathe the industrial-grey hose assembly and am looking forward to neon green or fuschia, and I prefer the "fighter pilot" mask image than Darth Vader, though Darth does share sound...
And I had to crack up at your remark about the mask-slipping sounds: my dog leaps up and runs over to check on me when a particularly bad one happens, usually when I'm shifting position. He also wakes me up if the mask leak alert too-quiet alarm goes off because I rarely hear it my self.
As for sleeping with others -- increasingly people I know are using CPAP (partly because I pester them until they get tested) and the odds of getting a roommate on trips, etc, who also uses one may be moving in our favor!
So glad to know you are persisting in using yours. I hate mine, too, for all the usual reasons, but since I now see the benefits -- including just how bad things got! -- there's no way anyone is taking mine away until something better (and non-pharmaceutical) comes along.