I've used duckduckgo on occasion, but don't usually. I started to after reading how search engine companies were turning search history over to law enforcement upon request. I don't have anything to hide, but it shouldn't be that easy. The one thing I've worried about in my search history is searching for medical conditions as in the last 3 years I've taken care of 4 ailing relatives. With searches on heart disease, diabetes, multiple myeloma, uterine cancer, and more, I was worried when applying for health insurance that the insurance company might somehow be checking my search history and think I was a real medical mess.