I think that customization actually hurts the game.
When I write, I try to capture everything in a scene with words; to do this, I believe it is necessary to be able to visualize everything happening as clearly as possible.
But every single scene in a CoG, if it contains a male/female protagonist, becomes a hurdle the writer must overcome. To successfully re-use a scene for both male and female characters, some details must be amputated, details which originally added tremendously to the flavor of the text.
If a writer decides to just use a scene for male and female protagonists anyway, regardless of whether the scene is actually interchangable; you get almost-funny but still infuriating scenes such as the one in the Choice of Romance Series where the queen supposedly effortlessly picks up her male lover and throws him onto the bed, which described the queen in rather masculine tones…
To clarify, I’ve got nothing against what happened in that scene, but the tone which describes the scene seems to have been written for the female protagonist with a male lover only. Adding “customisation” is a poor facade at best, and I think it would have been better if the writer simply railroaded everything to be played from a female perspective with a male lover if the writer didn’t wish to write different scenes for every possible sex and orientation.
In concept, the idea is good, but in reality, unless CoG is willing to put a lot more effort into writing the games (At least 4 different versions of every scene, for straight male, straight female, homosexual male, and homosexual female protagonists, not counting the love interest of said protagonist), the writing will either be:
A) Hindered by the necessity to make the scene work for all situations
B) Unable to cater to certain character builds and make the scene suck for such builds
So, I think that CoG have a nice concept, but what comes out isn’t always very well-made. Customization should be allowed whenever possible, but definitely not when it endangers the game.
Edit: Reading through other replies, I find that Drazen’s case seems very similar to mine… and his is also more concise.