Lets see in October I had 2 Toyota gas pickups, 1 Grand Am, and 1 Chevy Tahoe gasser.
I bought an 89 Jetta because the tranny on the GA went out, found out about WVO and now only my son's 4x4 Toy runs on gas.
As for sound the Jetta is quieter, the Cummins sounds way cooler, but there is a very throaty sound to my SDL that I just love. Which car am I most likely to still own in 20 years? The Merc hands down.
I got addicted almost immediately I am sure. My dad was a heavy duty mechanic all his life. I don't think he owned a shirt that DIDN'T smell like diesel. Until I got the Jetta I had forgotten how fast that smell brought back memories.