I've been playing in a Saturday group that plays Pathfinder 2 weeks and then Warhammer the next 2 weeks. We had 2 DM's who wanted to do different things. It isn't working for me. The break between means having awkward breaks in the action, plus I'm figuring out I'm not a huge fan of Warhammer FRPG.
My suggestion is use the Fantasy Hero rules. The Hero system will give everyone the ability to model their characters in a way they want to that mimics (or not) the class they are playing. Just beware that some people are bound to be better at squeezing out effective points for powers than others.
