I love Google because of its Webmaster tools. Once your site has been up a bit they really start to help you to know what people are doing to reach your site. Yahoo and Bing have these as well but no where near as good as Google's.

Results from searches I have found I rely on Google most as well. I don't really like to use any other search engine when searching.

Google and Google Chrome is the best. I love to use it at any time when i need it and of course it done.