I agree with gilbertaue here. The twin seats by the window should be avoided at all costs. Not only that you lose a table that can be used for storage, one of the seats do not have direct aisle access. Definitely choose the centre aisle pair.

Personally, whenever I travel with someone else, we tend to take a front-back arrangement so that we could get more storage space (esp with the storage compartments available by the sides of some seats). Although that is just personal preference.