All those saying you need a long garden, you don't. We have a small, north-facing garden and it still gets plenty of sun from about a third of the way down in summer. The end gets the sun throughout the winter too, so that's where I put all the sun loving plants. And the washing line 
I grew up in a house with a south-facing garden and, as a pale ginger, I spent my life indoors as the garden was always too hot. Yes, you can create shade if your garden is big enough for tall plants and trees to block the sun, but if it's a smaller garden and you try to do that you just block out the sun completely!
I love our north-facing garden because I get the choice of sun and shade. Moss is not an issue because it's not particularly damp. In fact, the only place we seem to get moss is in the alleyway down the side of the house which faces east.