I actually switch between candid or photojournalistic style to a more directive style depending on what part of the day I am photographing.
During the getting ready I might give as much direction as to where to stand to make sure you are in the best light. When it is time to take portraits of the wedding couple or family formals I will give much more direction as everyone will look their best with a little direction.
As for my personality, most people will say I have a calming effect in any environment that I am in. If you are looking for a photographer that will make your wedding day about them, then I wouldn't be the guy for you.