I really like Aerofly FS2, it is the best what I have seen during my flight sim career which is quite long.
But there is something I dislike the longer I am using this flight sim: the cockpit windows. In my opinion the cockpit windows in most of the planes show to much reflection. It is great what is possible today codewise, however it takes away from the possible immersion. There is this great landscape outside but the windows changes it to kind of milky. That's why I often fly with the outside view in order to see the fantastic landscape. IRL we look outside and focus on the distance, on the near mountain or a building and we do not see so much the reflections, we oversee them in a way. However on the screen we focus to the close surface of the screen and hence we see the annoying reflections.