Here are some I distinctly remember:
"Of all the things I've lost, I miss my mind the most"
"Celebrate Whirled Peas"
"My kid beat up your honors student"
"I break for Bluegrass"
"As in life or evolution
rarely is there a quick solution
anything worth while takes a little time"
When my eccentric grandfather was alive, he had two Porsches. They both had bumper stickers that said, "My other car is a Porsche"