I think that Google is the NO.1 Search engine all over the world and Google is my favorite search engine. I like Google because they have some cool stuff. For example if you will type and search for "Calculator" Google will load a scientific calculator for you. However, I am using most of the Google services like Gmail, Google Doc, Google Webmaster tools and so on. You can organize all the Google services with your one account and its very helpful for everyone.
However, I know that there we have more search engines like Yahoo Search, Bing and others. So, what is your favorite search engine and why its your favorite?