I just keep it simple I guess. I wash every Saturday morning my 2008 C350 Sport, 2004 Tahoe & 2002 Boxster S (all black) using Meguiars Gold Class Car Wash, clay rub & then a good carnauba wax only when they need it. Then I do a rim touch up and cleaning every evening and use a California duster in between just for quick cleaning. I also use Porsche top cleaner/conditioner and then Plexus for the rear window on my 02.
I am not overly obsessive but I do enjoy them looking nice and shiny.