I do think yours is maybe a little snake bitten. I haven't heard of so many issues with the diesels.

i've only owned mine for a year now, bought it with 61k miles and now it has 72k. I've had a few issues pop up, but all common for these cars. NOx sensor failure, EGR cooler crack, and recently the CE light came on stating the DEF tank sensor was bad (although it's then since gone away and not come back). Overall it's been pretty reliable.

Also I agree, it's hard to see myself driving anything else right now. I love the shit out of this car. (well, except for the E36 M3 I just bought as my weekend car)