I have had a '09 VW Jetta TDI Sportwagen since last November and absolutely love it. It has 140HP, which is not mind blowing, but the real story is the torque. 0-60, while respectable for a station wagon (~8.5 secs) won't raise eyebrows, but it's very capable when merging on the on-ramp or when accelerating out of a curve. While nobody will mistake it for a sports car, It's actually a lot of fun. Besides that, it's incredibly efficient. There simply isn't a gasoline powered vehicle that is anywhere near this much fun that gets anywhere this kind of mileage. It's far from gutless. This car basically flies in the face of each and every diesel stereotype: It's nearly odorless at the exhaust, no black smoke EVER. It's actually cleaner burning than many gasoline engines. It starts easily in the cold, to the point where it doesn't even need an engine block warmer. My old ford powerstroke was terrible in this regard. It's also very very quiet, barely any louder than a gasoline engine. It's very tough to tell that this is a diesel at all, other than the TDI badge at the rear and the rare visits to the pump. I'm only hoping that the positive diesel stereotypes still prove true, namely reliability. There are mercedes diesels out there with well over 1 million miles on them.
Oh, and supposedly the BMW 335d diesel is out of the world fun, haven't had a chance to test drive one.