Well I'm sure of racing if there is a defined start/finish to the races, if you can shoot other planes, etc then the action-shooter if definitely counted.

But... as far as simulation-vehicle-flying(plane) goes, it would actually have to simulate how you would actually be flying. iow you in the cockpit controlling the plane. I don't know too many planes that I can fly looking at it from a 3rd person view. (ok maybe one. but they don't really count )

Of course if you've envisioned your game in some way as 3rd person, and you think it'll work better that way, don't ruin your concept to just try to add another genre to the list. Go with what you think it right for your game.

oh and...

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