Make a character
Start from nothing and build a face, hair and outfit.
Here you build rather than choose. A blank character, layered hair, faces, eyes and outfits, and enough options that two people will not produce the same result.
Why these hold you longer
A scenario game ends when the outfit is done. A creator does not end — you keep adjusting one thing. That is why these are the games people leave open for half an hour.
Doll creator has the deepest ones. Anime is the same idea in a specific drawing style.