Sometimes it's the simple things... Just wanted to share one of the many things I love about WP. I have an Icon. The screen is optimum for blacks. So I've always used the Dark background, fretting that the light would drain my battery. 

Recently, I said f*** it, and changed to a light background, with crimson tiles. And its great. The whites are so clean, and it ties itself into everything. So while the UI hasn't changed at all, the UX is almost like its brand new. And I haven't noticed the battery drain any faster than normal. 

TL;DR - always had dark background, changed to light, and its like refreshing the UX