Originally Posted by
TheBOSman

Mine stays in my
pants/trousers pocket. The seat pocket is normally disgusting (too much time on USA-based carriers and LCCs

), and forbid one of these days if I put something in there and nobody has changed out the airsickness bag

.
Wallets/Passports are very uncomfortable for me in pockets on planes. So at one point I want them out. Then the laziness kicks in, I don't want to standup and get my bag (or belts light still on) so take it out and put 'temporarily' in seat pocket etc.
So in my backpack they go before sitting down and when I crash/evacuate I will rely on consulate/airline/aiprort to help me out.
When I lose PP on my own no one helps me out. Flights missed. Tickets cancelled. Customers angre etc....