Well that a silly question you have asked what i have that the internet user always prefer to choose google and they never go for bing because the area cover by the Google so my choice is Google.
99% of whole peoples who's watching this thread gives the proirty to Google only.. as it contains the most 87% traffic of whole internet. So, we'll use Google but we also use Bing as it also contains some amount of traffic with low competition.
I am personally switching to Bing because Google did not celebrate St. Patrick's Day in the U.S. I believe my heritage should be equally recognized.
none. It sucks. IMO I don't know anybody that uses it and I hardly get any traffic from them even on sites that get thousands a day from Google.