Galley up or down is something people feel very strongly about, both ways. Seems to be slightly preference to up but a lot of down too. I think partly depends on size boat. And many of the ones who like their galley's down, don't have them all the way down, just half a level down from the helm. So probably more galley up, then some galley half way, then a few completely down. More the gourmet cooks who want privacy all the way down.
Now we have a coupe which is a day boat and fun boat and a few overnights with galley down, but we would never have one down for real cruising. On that boat though as space up is limited, having a galley and sitting area down gives a second area to sit.
Still for trawler and cruising put us in the galley up group.