Heh, glad you answered because I would not have been able to answer.
Planefag cadet, welcome on board. Our coverage is thin at times and your presence makes a difference.
Salute o7
R7
Here's my short list of "when to tag and bag" gleaned from the experience of our squad leaders.
What to Tag and Bag
Diverted/refused landing permission
Keeps flying <4000ft
Any drones and UAVs
Any P-8 Poseidons, P-3 Orions, other surveillance and intel planes such as Sentrys, Nightwatches, Sentinels, Joint Rivets
Any AWACS, Hawkeyes, Mercurys
Any MAGMA callsign – but don’t post until they have “feet wet” (over water) when returning after a mission. Don’t endanger their mission by premature posting.
If you suspect an operation, bag and tag it, but post it later; allowing special operators time to complete their mission.
And here's the beginnings of a spreadsheet I'm using to keep my head organized. This is by no means complete. Just adding aircraft as I learn about them from our squad leader. This is a couple of days worth. I expect this will get very long and welcome suggestions for additional columns of data we'd like to collect, like last sighting for example?