Mmmm... chocolate.
It's harder and harder to find these days (meaning I guess it wasn't very popular), but I like to buy bars of 98% chocolate. There is no sugar and so it isn't sweet at all and is bitter—many people I know say it doesn't taste like chocolate at all (because you are used to the sugar loaded milk chocolate, I tell them). I love it. Wonderful stuff, esp goes well with a pint of Guinness (or any stout, really).