I hate them.
Sometimes the game is good enough that I can suffer through the sandbox, but I can't think of a single game where the sandbox element has improved the game.
The reason non-adult sandbox games can be good is because the gameplay of the sandbox is fun.
For adult games it's just a...
Unless the hair color is ugly it doesn't bother me.
Making hair colors distinct helps with remembering the characters when it is a game you haven't played in 4 months.
I feel like the game is dragged down by the size of the harem.
No girl is given enough development and it all feels shallow(even for a harem game).
Also, every time they have a closeup on a girl they have a creepy smile on her face.