I switched between left and right choices, so they do not keep bing on one side and google on the other.
Some insight in to why I made my choices:
Ebay results coming top, I did not like that.
When I searched my blog I got no results on bing! but then it is hosted on google :)
For mongodb I preferred results that pointed me towards the mongodb documentation rather than stackoverflow answers, which should rightly appear a bit further down the results.
The other searches were just better quality results in my opinion.
Try it yourself: http://www.bingiton.com/