Sadly, I can't split up my reaction into sections like that. I approach the game as a whole, and react to it as a whole.
Realism? When the performance of the aircraft, i.e., following the rules of flight, result in aircraft movement that seems aerodynamically correct and gives a feel of the aircraft that confirms or supports written accounts of the flight and use of it, then that is realism.
Luck vs Skill? If your die rolling sucks, but you do everything right and it comes out just fine, that is a sign of skill-orientation.
But, really, I can't split it up into sections and remain coherent, because I don't see the game that way. Kind of like asking a color-blind person to describe "Red."
PC games require hand-eye coordination that is sadly lacking in me. I don't like a game that challenges my body, and eyesight, I want to challenge my mind. And I like the social interaction with the other players too. Playing with friends is part of the fun. Gaming is a social experience, not a solitary one. That's why I don't like solitaire games.