[Messer]

I recently played "Stuka Leader: Poland" and I really enjoyed the campaign. If you haven't flown as a dive bomber before it's a good start. The Poles don't put much resistance until the later missions and the missions are structured in such a way that the problems facing you would be formation flying and how to actually perform a good dive towards the target, while keeping your squadron in check.

The Stuka is a really nice plane to fly, but if you start a later-war campaign (even in the East after summer 1941) you're going to have a tough time.