I don't maneuver to make sure someone is in front of me (I usually sit in the crosswalk), I just let the car sitting next to me go through the intersection first. Look at any driver training and they will tell you the same thing, no matter what you're driving/riding. It's also a good idea to take a look, no doubt.

I do have one exception to this rule...when I'm in a left turn lane with an arrow. I pull up far enough for the car behind me to trip the signal and then go when the light is green, after looking of course. I NEVER sit behind any cars at an intersection unless there is no possible way to ride around them.