Alright. I had some thoughts.

#1 How much of this is space based? A.K.A. Would our characters go off planet a lot. Or even at all? Because when you say Star Trek, Westerns, and Firefly, 2/3rds are space based. Rather than planet based.

#2 I want your dreams. *Makes grabby hands*

#3 As for a focus of characters, would the focus be more on the town they're in? or a set of characters? EG A band of Outlaws out to steal, rob and plunder anyone and any town in their way.

Those are my thoughts.