A good dinner tastes better than a good dessert in most cases. As for individual items around a plate, it all depends on how hot they will be and for how long. The hot things that are going to cool off very quickly get eaten first, to avoid having to eat them cold. Then the other hot things. Then cold. If I have anything cold. Also, never have the most filling foods first if you can help it because that will ruin the rest of your dinner.

But desserts are never that great. I'd take a quality mashed potato over a quality icecream on most evenings.

EDIT: Also, making your own food and buying your own food means you rarely if ever have to have anything you don't like. Yay for growin' up.