I'm kind of in the category of both. I want to say story, but I've enjoyed fun games with no story, and I've enjoyed story games with little gameplay. I think the synergy that was mentioned is important. They don't necessarily have to have good components of both, but they have to mix well for what they are trying to deliver. The games I've enjoyed the most have had enjoyable gameplay and a compelling story. The gameplay doesn't have to be revolutionary or anything. But it has to be fun, as opposed to mindnumbingly repetitive. And as good as the gameplay is, if there is a story, it'll have to be done competently, otherwise there's a ratio of how good the gamplay has to be to make up for it, and there comes a point where no amount of awesome gameplay can convince me to finish some tripe like FFX/XIII with their ridiculous stories and characters. The only way that works is with satire, like Magicka or something