Fighters:
Bf-109 G-10, high performance and 30mm cannon
Me-262, fast, 4x30mm, the ultimate goon hunter
Jabos:
Typhoon, fast, 4x20mm
F4U-C, 4x20mm and lots of ammo
IL-2, the best GV killer in AH, but it's fun in furball too

As everyone can see, I usually fly "cannon birds". I want fast kills, hate spraying 50-cals. In fact I have fired G10s MGs only twice in combat: once ran outta 30mm ammo when vulching and again as I shot down a flying zippo (B5N).