I once hit a family of raccoons. It was dark country road in the middle of nowhere. I still feel guilty - it was a FAMILY!
And I came close to hitting a deer once. Damn thing scared the crap out of me, I was driving through a blizzard and turned down a back road, and it was standing in the middle of the road. I screeched to a stop and (the large racked) buck was standing practically outside my side window. Yeesh.
I've hit lots of frogs. Can't avoid 'em. Stupid frogs.
Aaaannnd... the two worst deer stories I know.
My brother hit a deer in a Ford Festiva (tiny tin can). Broke its legs. He had to walk up the road to a neighbor's house to borrow a gun and put the poor thing out of its misery.
Some local kids hit a deer going 75 miles an hour. There were deer guts through the whole engine block. Had to take the kids out through the back of the car, after opening it up like a soup can. Youch.