It depends, which class I fly and which time.

If I am in Business I prefer window on (to me) new routes and if it is a day flight, because I could get out easy (o.k. not in the old LH C) if I want to walk. If it is a night flight, I prefer aisle.

In Economy, I take nearly every time an aisle seat, as I have more space and could get out the row at every time. As I normaly do not sleep in the plane (at least nor for a long time), I could walk in the plane without disturbing the passengers in the seat next to me.