Having spent all my time in the north west (Cumbria and now Lancashire) I have to say Northerly. At least from a northerly you used to be garanteed snow in Cumbria. Used to be being the important part here. Back in the day when the initial front past in a northerly we would get snow and then for the rest of the northerly it would be wall to wall sun shine and severe frosts, December 1995 being the ultimate example. I can remember going sale shopping in Carlisle and every river, even the Derwent west of Cockermouth, was frozen solid. Now though northerlies seem to only effect Lerwick, Aberdeen, Whitby, Norwich and Bergen! An easterly brings just the sunshine bit for these parts though while we are forced to watch news clips of people frolicking in snow pretty much everywhere else. Whatever the set up was that brought the Blizzard to south west Scotland, Cumbria and Lancashire in early February 1996 is my ultimate, I've been waiting for it to happen again ever since!