The single seats are nice, but my favourite is the 2nd row on the right side of the plane with an empty seat next to me. Of course that's up to luck.
The YYZ-ATL flight is a nice flight, but it's short. Very quiet in the front . If they have beef on the flight, order it (assuming you like beef), I haven't seen it in awhile but the SDs tell me that's just my bad luck.
EDIT: Forgot to mention the further back in the cabin you are the less likely you are to get your meal choice.