I'm constantly trying new launchers as they come out, and to be honest, the one I keep coming back to time and again is Nova. It's my favorite.
Two others I have fun with are Smart Launcher 3 and Action Launcher 3. But, Nova is still my favorite of the three.
There are other good launchers around (Atom, Arrow, and more), but none of them really support dynamic dates on the calendar icon (where the icon matches the current day) like Nova and Action do (and Smart Launcher uses a widget with a tappable date that opens the calendar).