I used to do that too (although some modules became my favourites), but stopped at some point, realizing the main reason I (and others) keep doing it is to compensate the lack of a game play, particularly - absence of a Dynamic Campaign. For me personally, the two modules would be enough - A-10C and F/A-18C if there would be a dynamic campaign. In DCS we tend to think the modules is what keeps us excited and busy, but no, I think it should be a game play. We miss a game play here a big time, and new modules is just a temporarily replacement. It is like a drug.