FM is a big deal for me and few simulators have it right. I think DCS and IL-2 have very good flight models but FSX and AF2 don't, really, neither does the Thirdwire line, although all of them have pluses.
Since I used to fly small planes, I know what a stall feels like and AF2 doesn't model it well or at all, it seems. But as for looks, no one can beat AF2. It does give you a genuine sense of flight strictly in the visual category, which is huge. If you want to know what flight LOOKS like, I would recommend AF2.