A dream finally come true! Me at the controlls of a real plane!! 11.5 hrs so far!! Cooler than I ever imagined!
I was postponing lessons because of the costs... but when I saw the low-winged Diamond Katana and found out it wat a stick (not a yoke/steeringwheel) and that it had a bubble cockpit like a fighter I went in and signed up the next day!!
I have to say WTG to HTC on the flight modeling!! I could not believe how "familiar" everything was even on my first flight. In fact my instructor even asked me if I had a lot of flight time because I could control it so well.
After 3 hours I nailed a perfect landing with an 18knot 90-degree crosswind on my first try. Even though I never have that in AH I think all the times I have had to "slide" my plane in on an angle to quickly slow down definately taught me the manuver.
The biggest difficulty I have had is that in AH I use my right-hand on the joystick but in the Katana I have to use my left hand on the stick. The second difficulty is that I do not have rudder pedals for my computer so that took some getting used to. The third thing is NO GUNS!!!

I'm no expert on the dynamics of flight and the "technical" descriptions would be too confusing for someone with no flight training so I'll just give some examples of the flight characteristics in layman terms

Flight Modeling:
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REAL LIFE: I have a little trouble staying straight down the runway on takeoff due to the prop rotation and the air flowing down the left side of the plane and hitting the rudder.
ACES HIGH: Same
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REAL LIFE: About 50% of the time I bounce a little on landing...because I suck at it

ACES HIGH: Same
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REAL LIFE: Any quick movement of the stick or pedals followed by a release to center will cause the nose to bounce all over the place
ACES HIGH: Same
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REAL LIFE: A stall is easily induced at any speed by pulling back quick and hard on the stick. Stall recovery is usually to return the stick to center or point the nose down to get your "lift" back and adjust throttle acording to the situation.
ACES HIGH: Same. The only thing I haven't done in real life is a stall induced spin but the instructions are exactly what I do in AH when it happens....cut throttle, point the nose down and apply opposite rudder from the direction of the spin.
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REAL LIFE: Due to the low wing, its hard to see anything under you...including the ground on takeoffs and landing. You just have to get a "feel" for it.
ACES HIGH: Same...for fighters
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REAL LIFE: A "Check Six" is useless since I can't even see it! he he he
ACES HIGH: Better six view in most planes.
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REAL LIFE: WIND SHEAR!!!!! Sudden wind gusts!!! Constant strong winds! All these things make flying much more difficult and can toss you all over the place. You have to be concerned about how you make your turns according to the wind so it wont flip you inverted or make you loose your lift.
ACES HIGH: Barely notice wind at all....it's pretty much not an issue....however if all those things were modeled into the game I can see that it would probably frustrate a lot of people....just imagine comming in to land 5 or 6 kills in your ME262 just to get smashed into the runway due to wind shear!
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REAL LIFE: G's!!!!! You can go weightless to feeling like 900 pounds just by adjusting the TRIM!!!
ACES HIGH: Holy crap if I did manuvers real life like I do in AH I think my head would explode or my neck would break!
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CONCLUSION:
There are lots more similarities but overall I can say anyone who complains about flight modeling has never flown a streamlined low-wing plane or they want too much realism which would probably drive more customers away than it would attract

P.S. Uh....if you like really suck in AH and are constantly crashing on landings, takeoffs, augers etc.....um....may I suggest.......stay on your computer!!!!!!!!!!!!!
It's good for your health!
Now other more experienced real life pilots may shed more light on this subject and just tell me I'm an idiot....but I already knew that! LOL