A ton of speedup in the bag checking process could be obtained by upgrading the kiosks for a snappier and simpler UI/UX.
-Swipe credit or frequent flyer card
[WAIT]
-Enter the airport identifier you are going to
[WAIT WHILE I PULL OUT MY PHONE TO LOOK UP AIRPORT IDENTIFIER]
[WAIT WHILE COMPUTER THINKS ON THIS]
-Is this your flight?
[WAIT]
-Do you want to choose seats?
[If you haven't done this online, hoo boy are you in for five minutes of frustration]
-Do you want to check bags?
[WAIT]
-Are you active duty military?
[WAIT]
-Can you confirm that you have removed all lithium-ion batteries from your checked luggage?
[WAIT]
-Federal law prohibits the following long list of dangerous items. Can you confirm that you have none of these?
[WAIT]
-How many bags do you want to check?
[WAIT]
[God help you if you have a nonstandard item here, eg skis+boots, which the airline will only charge you for one bag for, but will require two baggage tickets]
-Printing your bag tags.
[VERY LONG WAIT]
[20% CHANCE THE PRINTER SHITS THE BED]
-Please affix the tags to your bags in a way that makes perfect sense only if you do this frequently
[NON-FREQUENT FLYERS ADD 5 MINUTES TRYING TO FIGURE OUT HOW TO AFFIX THE TAG TO THE LUGGAGE]
[LONG WAIT TO HAND BAG TO EMPLOYEE]
Employee: You did it wrong, do it again.
I fly United a lot, maybe people on other airlines have more hope
Also, just to clarify my verbiage on the ground instructor bit, not at all saying that you couldn't do all the other aviation ones too (and you should, they were all a blast to get) and more...just that ground instructor is one you should specifically look into because it is relatively little-known, is straightforward and cheap to get for people like us who clearly find tests easy, and offers a fair amount of practical benefits (advanced ground instructor can teach ground for ANY part 61 rating, also you don't have to retake FOI if you ever go for CFI...flight schools in my area will absolutely hire someone on a ground instructor cert alone). No intent meant to cast any aspersions or to minimize any accomplishments!
Aviation - private pilot airplane single engine land; instrument rating airplane; complex, high performance, and tailwheel endorsements; part 107 remote pilot; DC flight restricted zone; instrument ground instructor (this might be a good one for you, just take the FOI and then AGI or IGI written tests and visit your local FSDO to get the cert issued). Considering getting my commercial, multiengine, and CFI certs
Maritime - master 100 tons inland / mate near coastal plus a bunch of random crap the USCG throws on there if you get those (need to renew these this year); American Sailing Association 101, 103, 104
Scuba - just the useful ones here cause I have a whole wallet memorializing money flushed down the drain: rescue diver, ice diver, solo diver, drysuit, open circuit advanced nitrox/deco procedures, 45m helitrox closed circuit rebreather w/deco, certified Poseidon regulator+rebreather repair technician (though the big thing I learned was just to send my gear to pros working with this stuff every day). Currently my big focus is training up to take the 60m normoxic trimix rebreather course in the fall
Radio - general class ham (failed the extra by like two questions, in my defense I had only studied for general), restricted radiotelephone operator (literally just a cash payment, needed this once for a flight I had planned to Canada)
Other - authorized to perform marriages, motorcycle endorsement on driver's license, certified analytics professional (took the test on a whim and passed, it's since lapsed but I might see if they'll let me re-up it), notary public (lapsed), have thought about doing PMP since I'd be good to go on experience reqs
I started an EMT course a while back but I dropped out after realizing I was never going to be able to remain at all proficient. I'm like this with my aviation instrument rating as well, I keep legally current with it but I am pretty cautious about relying on proficiency since I'm not flying multiple times a week
Probably some others I'm forgetting but these are the big ones! I remain really impressed with your list, you've come up with some good ones...will have to think on whether I need to pursue some of them myself :-)
https://www.nmra.org/education/achievement-program offers 11 levels of certification for people like us who have a profound need for external validation. My certification list overlaps with yours about 60% but Certified Parliamentarian is next level, my hat is off to you
-Swipe credit or frequent flyer card
[WAIT]
-Enter the airport identifier you are going to
[WAIT WHILE I PULL OUT MY PHONE TO LOOK UP AIRPORT IDENTIFIER]
[WAIT WHILE COMPUTER THINKS ON THIS]
-Is this your flight?
[WAIT]
-Do you want to choose seats?
[If you haven't done this online, hoo boy are you in for five minutes of frustration]
-Do you want to check bags?
[WAIT]
-Are you active duty military?
[WAIT]
-Can you confirm that you have removed all lithium-ion batteries from your checked luggage?
[WAIT]
-Federal law prohibits the following long list of dangerous items. Can you confirm that you have none of these?
[WAIT]
-How many bags do you want to check?
[WAIT]
[God help you if you have a nonstandard item here, eg skis+boots, which the airline will only charge you for one bag for, but will require two baggage tickets]
-Printing your bag tags.
[VERY LONG WAIT]
[20% CHANCE THE PRINTER SHITS THE BED]
-Please affix the tags to your bags in a way that makes perfect sense only if you do this frequently
[NON-FREQUENT FLYERS ADD 5 MINUTES TRYING TO FIGURE OUT HOW TO AFFIX THE TAG TO THE LUGGAGE]
[LONG WAIT TO HAND BAG TO EMPLOYEE]
Employee: You did it wrong, do it again.
I fly United a lot, maybe people on other airlines have more hope