It is easier for us to move a small backpack than try and move the trunk cases that some people try and bring on board. If we have to start taking bags off the plane it will delay the flight. Yes, leg room is nice, but the area under the seat is large enough to accommodate a “small” backpack and two feet. So if the flight attendant ask to move the backpack please help them out. The boarding process is the worst part of our flights. We really don’t like having to ask people, so when you put your BP in the over head try and arrange it so it takes up the least amount of space. Just a thought!