Firstly you need to decide which form is best for the position. If you have a patio area/arbour or garden arch that needs summer shading, but would benefit from open sunlight during winter, then consider a deciduous form of climber. There are some superb forms of this plant, such as the ornamental grapevine vitus Vinifera, this plant turns a beautiful red/orange foliage in the autumn and winter. Vigorous growing it is an excellent choice for covering a garden arch quickly. Banksia rose is another old favourite with gorgeous yellow and white double flowers. Clematis are another deciduous form renowned for their enormous star flowers in a variety of colours , Finally Wisteria with their abundance of long trailing flower petals in purple or white. Another great form of climber, just make sure you have plenty of room for this one as they can run rampant.