I think if you just consider Economy/Coach class, it is boarded back to front, after the 1st and business classes board first.
No matter what order I'm told to board, I usually wait until the last group, as I'd rather sit in the lounge and stretch my legs for 5 more minutes than in a cabin that feels all the more claustrophobic because of everyone standing in the aisles and reaching over me.
No matter what order I'm told to board, I usually wait until the last group, as I'd rather sit in the lounge and stretch my legs for 5 more minutes than in a cabin that feels all the more claustrophobic because of everyone standing in the aisles and reaching over me.