Best feature in Search engine...

Hello BHW Guys

Other than Google, Yahoo and Bing which search engine you prefer and why??


I like to know which best feature you like most about it than others. Today I know about one search engine (Bleko) which is mainly created for Social Networks.


So share your experience also. Thank you in advance.

I like http://duckduckgo.com/, cause they promise to don't save anything about you. Also, the instant answers are great.
For example you type in "highest mountain" and you get as answer "Mount Everest; (8850 meters)."

I like BHW search as it has really valuable information! LOL