I have parts of my town where there is a variety of fruits all planted organically (i.e. not in straight lines) kind of like a forest.
Another area, I have straight lines of all the same fruit in small orchards of about 6 trees with bushes and paths around them.
I put my tropical fruits mixed up together for fun.
Yeah, I arrange my trees. I feel like it makes the town look a lot nicer if you landscape it a bit, but the moment I've only been able to arrange the trees nearest my campsite. I got Leif's flower shop in my town last week and they didn't have an axe in until this morning -- it's already cracked, too T.T