This goes double for ponds, fountains, fragrant plants, bird stations and kitchen gardens located too far off the beaten path. Ideally, kitchen gardens should be in the sunniest space closest to the kitchen. No consideration for vistas from indoors. Your view from a tiny bathroom window is of your neighbor's bathroom window. Every time you don't consider the view from indoors, you've missed a chance to showcase your garden.
Windows are especially rewarding for placement of bird stations and water gardens.
No consideration for vistas from seated areas. You finally sit in the space, and realize your view looking out is of your neighbor's dog house, garbage cans or clothesline. This is a major problem for gardeners simply because so few of us take the time to actually sit and enjoy. Before placing outdoor furniture, locate a favorite spot in the garden that offers the best of views, sound and fragrance. Then make it your own.