F4Fs are tanks.
P38s are a sinch (big target, weak tail)
Yaks are slippery fish (used to have a tough time with them)
N1K's are definitely satisfying but not as much as they used to be (I only find poor pilots nowadays).
Zekes are fun to set fire with MGs and watch them fly around and meet their ultimate fate.
I sympathize with Hogs because I am a hog pilot.. and I see and exploit their mistakes.
109/190s are fun to scissor and rip a wing off. My LW brethren, forgive me

Mosquitos set fire just as easy as zekes do.
Come in at a high angle, take out their turrets and watch them flail helplessly as they attempt to gun you down with the Hull MG.
LVTs stranded in the water give me a warm fuzzy feeling as do ostwinds. Come in at a high angle, take out their turrets and watch them flail helplessly as they attempt to gun you down with the Hull MG.
Spitfires have a neat tendency to set fire and have a left/right wing tear off completely (which is good)
La7, yes. Gotta teach the newbs to get a new craft.
Typhoons: filling them with their own 20mm is satisfying.
BUT
My favorite is putting hot taters into another Me262 from my own quad-tater launcher.
[EDIT: or ANY kill from my P40]