Once upon a time, two sisters wanted to make a reverse harem sort of story, but shipped the girl with one of the guys too hard, and they also developed all the characters so much that not all the boys would even be interested in the girl character, and as time passed, it just ended up becoming a slice of life.
That's how FPS was created.
As for APLPA... I started it on a whim because I wanted a cool pokemon story unlike any others I've seen. And it's right to left because I read a lot of manga before I made it, and accidentally started making panels like traditional manga...
Two anecdotes, two sisters, one dream team.