I haven’t read dropzone’s links, but I did read a book a couple of years ago that attempted to resolve the mystery of who shot Richtofen down. Part of the problem is that both the AA gunner and the British fighter planes were equipped with .303 machine guns, which makes it impossible to tell where the fatal bullet came from based on caliber alone. However the authors concluded, based on wound descriptions and sketches made by the doctors who performed the autopsy on Richtofen, that the angles of the entry and exit wounds indicate that the bullet was fired from the ground.
Of course, the Germans couldn’t believe that The Red Baron could be shot down by a lowly enlisted man on the ground! He must have been shot down in aerial combat by a brother Knight of the Air! Brown was persuing, and he was shooting. (Or at least he got off a short burst.) But from the evidence I’ve read, Richtofen was killed by the Australian AA gunner.
Incidentally, while Richtofen was killed in a Fokker DR.1, that was not the only plane he flew. Many of his kills were in other types. The DR.1 was very maneuverable, but it was not as good a fighter as the Fokker D7. (IIRC, Germany was specifically prohibited from having any D7s after the war.)
The most effective way of shooting down an enemy aircraft is a “hit and run” approach. Richtofen used this a lot.
As far as skill, there is something people should know about WWI aircraft: Many of them used radial engines. (Many used in-line engines.) The common engine in use at the time was the Le Rhone. The Germans used a copy of it (which I think they were building under license before the war). Radial engines made after the war have an engine block, cylinders, and a crankshaft. The engine block is mounted to the airframe, and the pistons turn the crank within it. The Le Rhone had the crankshaft mounted to the airframe and the block and cylinders routated around it! The propeller was fixed to the engine block.
So instead of just having the crank and prop spinning around, you had the prop and the whole engine spinning around the crankshaft. This resulted in a lot of torque forces. A pilot had to be skilled to handle them, and many pilots were killed in crashes. Another thing is that – at least early on – there was no throttle. Your engine was either “wide open”, or it was off. Pilots would modulate their power (for example, while landing) by turning the switch off and on.
In addition to the massive torque forces and the on/off nature of the engines, there was another problem. The engines were lubricated with castor oil, which would be flung out in a mist as long as the engine was running. Castor oil has a laxative effect, and it made many pilots quite sick. Imagine being nauseated and having to squirt your bowels and fighting for your life all at the same time!
So Richtofen was certainly aggressive. But he was also an excellent tactician and an excellent pilot.