If it's just your food, nuke it, by far.

But since I do the cooking for three people and one rarely leaves the couch, let alone the house, a microwave just isn't big enough for cook that much food without extra work in finding the microwave safe dishes to cook in. Or the fights about whose tv dinner gets nuked first (seen a bloody nose or two over that one). In that case, it's easier to bake something. That way I can make the shared portion in one dish, their meat in another, and my veggie something in a third, all in one oven.

There's going to be a little extra work in my cooking anyway, as I'm the only vegetarian in the house and the other two are in love with meat.