Hello. According to that survey you're looking for appealing themes and art styles, but no mention is made of the actual project that you're going to use these with. That's arguably the most relevant factor in making a visual guide, "what is the project like?"
Limbo, a game about an underworld where you travel as a soul, has a dark, gloomy style. What would've happened if the developers had done a survey and the top choice was the candy theme?
If you already have a project outlined, making the visual guide for it will become that much easier with fewer choices that fit. The survey should've been, "given this particular project [describe project concept], what theme and art styles do you think convey the concept best?"
