This past weekend, I flew F on a 735 and boarded after all the other F passengers were seated. There was some room left for bags above 2EF, but that bin is impeded somewhat by the exit sign bracket. The FA actually offered to help me stow my rollaboard and, if it did not fit in because the bin did not open all the way, to take stow it somewhere else. My rollaboard ended up fitting into the bin, but it was a nice gesture on the part of the FA to make room for it somewhere else.