#1 109K4 -- Experienced sticks, tough escape options horizontal or vertical and these guys are generally good with the scissors
#2 Typhoon -- Straight line attacks usually detected but always while the "SA bubble" is compressed, tougher to set up good evasives in time due to that closure speed. Decent sticks.
#3 190D9 -- Awesome roll and speed, easy to kill slow, but the good sticks won't let that happen
#4 P51 -- Most of these guys seem pretty average but a headache in packs above you and a few guys have excellent shooting skills (yes that means you steve:)
#5 Yak -- Specialty pilots common in this one, the Yak doesn't seem to kill me with its guns, it ties you up or defends itself just long enough...

Honorable mention: F4U, P38: Seems like you either know how to fly these or you don't, and most don't.
Easiest:
SpitXVI, N1K,Hurri, Zekes: Fragile aircraft with lower ENY values seem attract inexperienced pilots. These make for easy one shot kills that even out an engagement much faster than going for that Yak or F6F.
