So here's something to consider.
For each decision you make, how many potential customers do you gain vs alienate?
It's kind of obvious, that you want many people to play your game, so start thinking about how many players you think you may alienate with your choice rather then speculate what people want. It's a bit scary but very useful. Many ideas suddenly seem less awesome...
An example could be deciding art style: Everyone will be nude vs everyone will not be nude. Alienate vs attract - A lot of guys would be attracted but shitloads of people would instantly be alienated and would never go near the product. We'd better go with not nude. (I'm not trying to make a statement - just proving a point)
When in doubt you can try this as it often points you in the "right" direction.