My least favorite manufacturers would have to be Chrysler and GM. Shit cars plain and simple. Although, I am sad about Pontiac getting chopped. I liked the look of the G6s and, even tough they weren't actual Pontiacs, just rebranded Holdens, the G8 and the GTO were quite nice as well. Plus I wanted one of those damn Utes... I can't understand how they got dissolved but the miserable failure that is Buick lives on and Cadillac for that matter. The New Standard of the World? What world?
I have owned four Volkswagens and currently own two. They are some of the best cars I have driven. I don't understand the reliability problems everyone has. My '99 Passat has over 245,000Mi on it with no problems and that 2.8L V6 is one of the best engines, IMO, built. That's just me though.