Pigstompers, I remember flying against them in the early 90's in Red Baron 1
The Airheads, my old squadron from the RB1 days... some still fly now, WHELS for one. Anyone from RB1 remembers us.
Nomads from Airwarrior... I hated/loved flying against those +Guys+
The Ol' ones from AW
USMC from AW, WB, AH1&2 - I was a member of this squad and continue flying with Grim now in the Grims Reapers squad.
367th, fine group of enemy pilots... They have a lot in common with us.
AKs, always a good fight
JBs good friends or foes depending on which side theyre on this week.
The damned, a damned good group.
There are other good squads out there, some are just too new for me to say they are memorable YET... we'll see how it goes.