1st preference is Window because I can lean against the wall and also look out the window, sometimes the views can be stunning.
Aisle is ok but sometimes you have to constantly get up to let the other two people out which can get tiring but the pro is that you get a bit more leg and elbow space and also can get up easily to use the restroom, more space to eat food as well.
I absolutely hate the middle seat, it does not have any positives at all and if I can avoid it I don't sit there.