When I know what I'm looking for, I use Bing because that gives me better results. When I don't know what exactly I'm looking for, I use Google for its randomness. I do find myself using Bing much more often because I usually do know what I'm looking for. But, sometimes, you just don't know what somethings are actually called until someone throws them at you. (And sometimes, even if someone throw them at you, you still don't know what they are called!)