Before starting my last campaign I e-mailed out a set of options for the potential players including a few 'style options'
the players all signed up for the magic university city, with a lot of role playing and more 'tongue in cheek' feel instead of the more dark & gritty resistance fighters or military scenarios
Because we talked throught the style at the start of the campaign, it hasn't really been too difficult to end up with a style i enjoy as DM, and players also stick to.
It helps that I've gamed with on & off for the last 15 years over half the players in the group, so that always keeps a consistent tone, and also means Players arent shy about criticising or querying situations after the session.
I tend to encourage a lot of background to characters, even to the extent of running extra session and basing games around PC desires rather than vague plot - it all helps !