Now here's a front yard planting idea for curb appeal that you don't see a lot of. How about matching the plant type and color with the trim or dominant paint color of the home? Since there are so many different shades of plants in the world, this shouldn't be too hard to do.
Along the same lines, you could also get some great combinations that aren't so obvious by using plants that have colors that are in contrast with the home rather than an exact match. Not generally the way designers create their entire plant scheme but it is an idea and an option.