@Spirox.
If you want to stay with an 'anime' style in Daz3D, I'd suggest taking a long look at Sakura 8...
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Here's one of the 'addon' characters for Sakura (not in the pro bundle though), Hotaru:
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Hotaru reminds me a bit of the line art character you were sharing earlier in this thread, hence my suggesting you taking a look at her.
Sakura's probably the most 'anime-ish' character for Daz. She has some quirks that you'll need to get a handle on, mainly how the eyes are put together, but she's obviously built as a strong homage to anime characters.
Sakura seems to have a bit of a following, and a handful of other addon characters. Also, there's a few free characters for Sakura over at ShareCG, etc. including at least one male morph. Plus, you could mix and match some body morphs to come up with your own characters of course.
There's also Karyssa 8, who isn't quite as anime but still a cutie:
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If you like Karyssa's style, yeah Marcius makes some really cute characters along Karyssa's lines.
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Anyways, if you like the '3D Daz anime/Sakura' style, or using characters in the "Marcius/Karyssa' vein, yeah I'd love to play such a game if the storyline interested me, but of course go with wherever your heart leads you. Working on a game is much easier if you personally like how the characters look, and especially if the images invoke their character voices in your head/they 'speak' to you. Not in a crazy psychotic way of course, I mean in in a storytelling context.
Keep your chin up! Sorry it didn't work out with your artist guy, but on the bright side, at least if you do it yourself you won't have to split the profits as it were...