Google is fine but new engine from microsoft - Bing has some great features (especially when searching for images or video)

If you do not like that someone (e.g. Google) is storing information about you, your searches and sites you visited then Cuil is a great choice. (they do not store your steps. It is pure search engine)

And for specific searches (e.g. related to science) is great Wolfram Alpha - it is the real revolution. Try it!