Same, well I use the rear lights as a guide and position to be seen in rear-view and right-wing mirror. Though tend to fall a bit further back as well if there's a lot of left-side junctions, to be seen better if someone tries to pull out behind the car in front. That's generally what I do anyway. But I do tend to ride to the best of the condition, sometimes you have to just think "What if" on some roads and ride differently. e.g. behind a lorry or tractor, car with rear-view blocked, van with wing mirror missing, lots of bends with minor road junctions etc.