True,
YYZ is always very busy (but I think the International arrival is even worse if you want to pick up somebody - simply no space to wait and millions of people...).
Check-in wise I think El Al is very bad, because they have the higher security measures. I never flew with them, but always saw them checking in at
CGN. They closed off a separate gate, you needed to be there at least 3 hours in advance, and often they manually searched every suitcase to be checked in...
I also always had long lines at
BUF! A small airport with quite a large amount of flights, but too few check-in counters and check-in machines.
PMI is bad news as well - all the charter and no-frills passengers. I 100% agree with RicardoFG: I can't stand it anymore. I know it sounds arrogant, but after so many times and so many years you just want your peace and quiet (at least I do).
Any Greek airport is a nightmare to check-in at. Mind you, that has been a few years back, but consistently (I was at
SKG,
CFU and
KGS). Very unfriendly staff, not speaking English, chaos everywhere, and nobody seems to know what they are doing...
With all these passengers and associated small and big problems I am always amazed how efficient and friendly most check-in staff are. They are doing an awesome job, sometimes under extreme time pressure. And they still smile and are friendly - many genuinely friendly and not "service"friendly...
Cheers
micha