Ok so I know I am weird and stupid - but I hate electronic BPs - I always get hard copies.
I also hate non colour coded physical BPs a la MEL - gotta have colour - when you check-in online you can print coloured ones which really aren’t exactly like real ones but at least you can get a coloured copy if you want - leave it home and get a real white one at dep.
I always keep BP stubs / train tix stubs etc as kinda souvenir of trip - told you I was weird
Review meals to be consumed en route prior to online check-in - esp premium cabins - maximising flying exp requires due diligence - leave no stone unturned!