Countries in the north have long hours of light in summer and long hours of darkness in winter. Shifting time by one hour doesn't seem to make any difference, but I live in the south so I have no direct experience. We have light from about 5 AM to 10 PM in June with DST. That's very convenient. Maybe I'd go for double DST, even more convenient: people still sleep here at 6 AM. DST in winter would mean to get out in the dark at 8 AM, Scandinavia like. I don't look forward to it, but I don't look forward to darkness at 9 PM in summer and useless light at 4 AM. So I voted for keeping the current system (I lost) and for permanent DST (a useless vote because it will be decided country by country).