Option 2

Asymmetrical structure is obvious only when a room is unfurnished, and even at that, it isn't always a bad thing. Maybe pick up a cheap mini furnishings lot sometime (either craigslist or Hobby Lobby when they have their 50% off sales) so you can "stage" a room as you're working on things. Neither of these choices seems better than the other.

Very true! One option is symetrical, but looks cramped, although the room is bigger than the master bedroom where I live now. This way looks lop-sided, but maybe not so much after its furnished. I have a cheap furniture set, but I don't think it's true 1/12 scale. The pieces barely fit in the room.

Having one larger window makes the room look larger to me for some reason.

The differences in the size of the windows can easily be de-emphasized with curtains.