Like pretty much everyone else here, I always resort back to Nova Prime.
I'd LOVE to use the Google Now launcher since I've become pretty dependent on Google Now as a whole. But the launcher is missing 3 key things that keep preventing me from sticking with it:
1) Built in ability to change the icon theme
2) Built in ability to resize the icons in both the desktop and the app drawer
3) Built in ability to hide apps within the app drawer
Nova Prime has all of these features. It's just missing the swipe left for Google Now. But a quick flip up with the finger launches Google Now just as easy.