It just is.
Okay, so that's not a great answer.
There are a lot of awesome things about cereal. You don't have to cook it (I'm only talking cold cereal here, obviously - no oatmeal, which get's it's own special category), you can eat it straight out of the box, or get fancy and pour some milk over it. I recommend putting it in a bowl first.
1. Kashi Cinnamon Harvest - if you haven't tried this, go out to your organic food section at the grocery and check it out. Made with cane sugar, and it's just...yum.
2. Raisin Nut Bran - the stuff that started me thinking about this topic. I'm eating it now. It's the nutty covering all over the raisins that makes it special. It stays crunchy in milk for a decent amount of time, too.
3. Wheat Chex - Sometimes, it's all about the basics. This stuff is just good. Period.
What's your favorite?