When I've played other games I've noticed a few things that I am actively working on doing differently.
They use one static image for a long list of dialogue.
They tend to have an extremely grindy quest system.
They tend to add a feature then wait months to grow or update it.
Every girl has exactly the same personality, body shape, dress sense and acts the same.
What I can reassure you on is I'm not planning on repeating these mistakes at all. That is what I'm promising you as a developer. I also plan on being very active in my community.