Yup, always sad. I'm not sad for bugs smushed on the windshield, but everything on up from there, yes.

On a lighter note, one time I was road-tripping to the Great Smokeys with DP-du-jour (1990?). Up ahead we saw what we thought was road kill. Both started to get really sad. It looked like several animals, a whole family? As we passed it, we realized...it was chunks of turf. We laughed about the tragic turf roadkill for the rest of the trip.