While Google seems to be the first choice either by default or habit, I have found very inconsistent and erroneous search results lately.
Take a look at this… I searched for best personal information software and got results in the top 3 from google for an article from 1999. Not relevant. This is just one example. Also, I feel that personalized results should be something you opt into, not out of, by default.
Do your research. Don’t just use google blindly.