Have you ever changed political parties, and why?

When I first registered to vote, I thought the Republicans were becoming more moderate (John Lindsey was the new shining star, Nixon was on his death march in the White House). At the time, the Democrats were in the grips of hard core liberals (McGovern, Humphrey, EuGene McCarthey). 5 years later I felt so out of place, I switched to the Democrats, who were controlled by moderates at the time. My political preferences never changed during this time.