I love s'mores. When I was in college, I had a candle that I would roast mini marshmallows over using a toothpick. Then I would make s'mores out of them using two teddy grahams and a chocolate chip. They weren't the best s'mores, but they were pretty good for a college dorm room.
These days, I have a fireplace in my house, and I can make real s'mores. We've even experimented some with different ways to make them. Here are some things I've learned...
-Petite Ecolier cookies are a really good substitute for graham crackers, 'cause they already have the chocolate
-a slice of banana or a couple fresh raspberries are delicious in a s'more
-those super huge marshmallows that they make now roast beautifully and come out perfectly molten all the way through, but they're equivalent to about four normal marshmallows
My personal preference for a marshmallow is that it be perfectly golden brown all the way around the outside. Though, they're still good if they get burned.