Easy. Black front cause this is an Android, not an iThing. Bright green back, because my first cell phone was terrible, but the green faceplate made it MY terrible phone. Orange accents for a nice contrast, and green and orange really go great together. If a case is an option, it would have to be the clear one. No point covering up all that wonderful customization. Just a plain black wallpaper would do nicely, to take advantage of the wonderful battery saving affect of using one with an AMOLED screen.