Exactly the same effect between different people and different seat positions which is why your single point of reference for taxiing will not work for everybody. Still.
Running the right leg over the centerline works for everyone. Just to clarify: the method is
not to stare at your right leg, or even shifting your view between outside and inside to watch your leg.
The method is to let an imaginary line run through your right leg (your should be able to feel and know where your right leg is without looking), all the way outside the cockpit, and align this line with the taxi line.
(Of course we are talking about taxing, for landing put your butt on the centerline - hope you know how to find that too without looking). 