I E39 BMWs. I drove a Manual 530i and I couldn't get over how awesome that car was to drive. I'd love to own a clean example in the future. I feel like BMW was at their prime with that car, an absolute classic.
The only thing amiss with that car is that I don't have one. Brilliant motor, gearbox, interior, styling (although some tell me that it looks like a '94 Accord), quality, etc., etc. I'll always say that this was one of BMW's best.