I've found the presets to be pretty good. I do like to play with manual color temps if I have time, but I really like shooting a whitecard to absolutely set the white balance.
1999 e46 328i Ti Silver / Black[retired]
2007 e90 335xi Jet Black / Black[retired]
2011 e70 X5 35d Vermillion Red / Cinnamon
2011 e92 M3 LeMans / Fox Red extended