Which hand signal (brake, left, right) do you most often give when having your arm out the window? Do you mean it, and follow through, or is this the old-fashio

Which hand signal (brake, left, right) do you most often give when having your arm out the window? Do you mean it, and follow through, or is this the old-fashioned equivalent of leaving your turn signal on? Note: hand signals are still legal, still tested on driver exams, and (as I saw a few weeks ago) still actually used for real.