You know, it really seems there are three types of "wargamers". Those who stick to the rules, all the rules and nothing but the rules, those who like to comeup with new rules, give little twists and use this for that, those for this. Lastly there are those who like to paint it and put it together.
I try to run games every sunday. People have liked that although I may not have a force they like, they can walk up with their models and I can show them how to make a playable team. A few times have the judges gone up against steam powered hulks and their "driver" or a grim dark citidef, and on one occasion we had pirates from the Black Atlantic.
Dont be afraid to try to fit models in somewhere. Experiment and give feedbeack so the rules can grow and evolve.