Simoun, Sentou Yousei Yukikaze Recommendations
Both of them are about war, dogfights and personal problems. The main difference lies in the fact that Yukikaze is SF and Simoun is more like Steampunk, but if you'll like one of them at least a bit, you'll most likely enjoy the other one. Both series also have a wonderfull Soundtracks, fitting the events in the air and on the ground. Simoun is also known as a yuri anime, but it's not really like most of the yuri series.