I have never noticed this "lost" or "gained" hour.
Unless having to wake early so needing to set the alarm clock for Sunday morning I let myself sleep naturally, whether I re-set the clocks on Saturday or Sunday. So I still sleep for the same number of hours as I would have done anyway.
One myth I saw in print was "longer daylight". Rubbish! The hours of light and dark between sunrise and sunset do not change simply by our calling noon, one-o'-clock. All that happens is we adapt our lives to make a marginal difference to how we use the same length of light available.
I wish we could stick with GMT (or UTC as it's called now) and be done with it.