I've always had a soft spot for Toyota. My family has owned several Toyotas over the years and they've been good cars (albeit really slow ones). Also, my brother owns a Mk. III Toyota Supra Turbo. Great fun to drive and to ride in.
I also have a soft spot for the brand new French cars (Peugeot, Citroen, Renault) as well as Volkswagen, simply for the appearance. I know very little about these cars in real life, but they do look wonderful. I'd love to own a Peugeot 206, it's such a pretty little car. It's too bad the GTI V is the only Volkswagen that reflects the company's new style, because I think the new Jetta, Passat and Phaeton look great too.
I have to hand it to Nissan as well, for carrying the torch with three different sports car lines - the Silvia, the Z, and the Skyline. Toyota used to do that, with the Celica, MR2, and Supra, but they ditched all three (shame on them). Now if Nissan would just bring the Silvia and the Skyline to the United States...