I love that the game is so slow building and teasing.
I hate that it takes the MC so long to accept everything, after so many times Petal makes him see the most logical reason.
I like the background of all the characters, they are very well built.
I love this game, the story isn't some teenaged "hur hur, lets bang" sex scenes in the first five minutes, there's a real sense of a believable father daughter relationship developing in this way. Unlike so many other titles, there was nothing in the story that broke the immersion.
It is one of my first VNs, discovered through Itch as a demo, and still solidly on my favourites list. Any time I've seen an update to the sequels, I've gone back and replayed Petal.