Totally depends.

In general this is how it goes:

There is not much traffic... I keep my position and attempt to trip the light by myself. If a car comes up behind me I stay put.

There is traffic... I am respectful of the fact that I am able to move and cars may want to turn right. I put myself near the curb, or with my right foot on it. I look back at the driver (who is usually keeping their distance) and motion asking if they are turning. They'll either wave me off or see that it's OK to go ahead. If they wave me off, when the light turns green I find they have more respect for me and give me proper distance. I have yet to have a problem in this situation yet.

If the traffic is ahead of me, I wait my turn just like they do.

I will never do #3.