Your garden is unique, or at least it should be. It should contain plants you like, plants adapted to the site, plants that have local or personal connections. I don't do 'design by numbers' - the same set of plants trotted out for each garden, but treat each garden and customer individually.
Here are some starting points and ideas for gardens I can help you create:
Traditional English Garden - roses, hollyhocks etc.
Mediterranean Style - drought-tolerant plants.
Historical Period Gardens - e.g. for older properties, or historical garden restorations
Prairie Style - naturalistic grasses and perennials
Low Maintenance Childproof Garden
Scented and healing gardens
Colour themes - e.g. a white border
Gardens to attract bees and butterflies
Gardens on a theme - e.g. Islamic or Japanese influence
Incorporating fruit and veg into the ornamental garden
Wildflower meadows and spontaneuos vegetation management