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Lets see, the oldest one i remember was about a moral dillema being something like "Is it more justified to be an inherently good guy but turn to evil due to misdeeds done to you, or inherently bad guy turned good to redeem himself"
Another one was something something about salvation and forgiveness/self forgiveness
Another one was about a dude who went to more and more extreme risks to draw power to succeed from and eventually resorted to near-death expiriences and ultimately died in the end (although it wouldve been hinted he mightve staged that)
The last i could remember was about a group of people following their dreams to the extreme, kind of like the fable of Icarus and they would mostly die or had horrible things happen to them, i think there was some wing symbolism involved heavily as well.
Thats about all i could remember but maybe there were more.