The Luftwaffe developed its own fighter aircraft doctrine and implemented it consistently. German fighters were mainly designed for achieving superiority in the air by way of specially planned airborne operations and “free hunting.”
Preferences were given to aircraft optimized for vertical combat at mid to high altitude. This concept is reflected in the aircraft design of all German tech branches.
German fighters have decent health pools and good firepower. Their auto cannons are usually well built and overheat slowly. Most don't maneuver very well though.
German heavy fighters are the only ones in the game until tier 4. They have medium health pools and are high altitude planes.
German attack aircraft are only represented currently by one premium aircraft. It resembles more of a heavy fighter than an attack fighter.