I can think of a few planes I'd like to see, but...
All I really want is an incentive for people to stay alive. I think the most annoying thing in this game is the form of Lancs coming in 2,000 feet over the field, expending their bombs and then augering. Then, 15 minutes later, you see them again and they do the same thing.
In real life, the only good thing about suicide bombers is they only get one chance to blow up the cafe...