Very Interesting question but from my standpoint requires 'MUCHO' explaination.
I started online WW2 sims with Airwarrior on the 'GEnie' network in 1990 or so(as Ivan the Terrible, I.E. Yak9D driver). 2400Baud, 9600 Baud had a $urcharge. I blasted $500 one month in fees

. After a short stint i left the online world and stayed dormant until the intro of WB years ago. I didnt play for long but what i was disappointed in the most was the lack of community that WB had in comparison to Airwarrior, always felt like a 'snob arena'. Later i played the BETA of FLying Circus(as THUD), then Dawn of Aces (as Grappl), also AW3-Beta on the Net (as Grappl), flew some AW3 on Gamestorm )(with the 'Groverats' squad), then played a few times on simguilds 'Battle of Britain'sim also, intermittent periods of Fighter Ace (as Soff the Slavic). Then when i saw HT and some others had left WB and were starting a new game i had to check back in.
Only thing i can still see about AH is that it hasnt yet developed that merry spirit that AW in the 90's had. Maybe thats just me but then again its still young. But i always enjoy flying and looking forward to the new A/C that get put in it

! Also, its currently the only one i play

Flight Model feels real from my 'real' flying experience.
Grumbler (AH)'Old Ancient of Days

'
formerly
Ivan the Terrible aka IVAN (GEnie circa 1990)
Soff the Slav(AW3 BETA)
Grapple (AW3 Gamestorm/Groverats squad)
THUD *SL* (Flying Circus)
Soff the Slav (Fighter Ace)
etc. etc.
