Depends on the situation and the plane I'm flying.
If I'm in the P-38, I use a mix of Energy and Angles tactics to achieve the advantage and kill.
In the Me-262, it's strictly Energy fighting with only turns to achieve a deflection shot on high speed passes.
In the A-20 and Ju-87, I use Angle fighting tactics to achieve the advantage and eventual kill.
Ack-Ack
479th FG - Riddle's Raiders