See, I'd make a few different kinds, but I like baking and things of that nature.
Otherwise, it depends on the kind of party it will be and the food preferences of the people that will be there. Exotic flavors and different combinations of ingredients are cool, but if you're hanging out with a crowd that feels that anything other than 'traditional' chocolate chip cookies (no chunks!) is evil, making all kinds of creative flavors will go to waste.